I think this is gonna be a long long blog but it's a great topic and all this had worked with me so I hope it could help you too. :)
Thanks to @missy @rambo and @lyxzen once again.
How to Handle Haters and Jealous People
People who hate and act jealous are one of life's constants. Sadly for such persons, life is one huge battlefield, filled with traps and bogeymen. Their way of coping with this skewed picture is to send forth their defensive hate monsters, to ward off the dangers they've conjured for themselves. And there is nothing more such people fear than someone who represents all the things they wish they were or had themselves. Thus, it's a lot easier to hate on such people or to show outright jealousy, as it's a lot easier than working on one's own shortcomings. What do you do when you're the target of their vitriol, minimizing and gossip? You stand taller, brush off the insults and keep doing what you're best at. That, and a little help from these suggestions.
Ignore the bad behavior.
A common thread behind people who treat you in a hateful way or act jealous around you is that they are feeling inferior but want to come across as being superior. A lot of the things they say are coming from a very dark inner place, and once they're in a group, they're feeding each other's monsters. Unfortunately, it becomes easy to project this onto someone who hasn't participated in the gossip or maligning, and if you appear to be capable of doing things they are not, you'll be a natural target. Whether or not they're accurate in their assessment that they have something to be fearful or jealous of does not matter; they've decided that there is something to worry about and so, you will need to be strong and not feed their fantasy.
*Realize for your own sense of well-being that this is not personal to you; it's all about them and what is missing inside of them.
*Understand that their lack of self-competence is driving them to take cheap shots at you because they see something in you that they want but can't have, usually because they lack the discipline to put in effort or to try harder. Again, it's not about you; it's right back to what's not going right inside of them.
Kill the haters with kindness.
*They really want you to fight back, so don't. Be nice to them. For example, say "Good morning", "Hello!" or "Have a good day."
*Acknowledge their presence but not their vitriol. If it becomes clear that they seek to dress you down in public, don't even acknowledge their presence.
*Do not be drawn into a tit for tat fight or argument. They've got mounting reasons to project their demons onto you, and you'll only feed the anger, hate and jealousy if you start calling names, insulting or even trying to explain yourself.
Do not reveal any distress or upset.
*Satisfaction will be temporarily gained if they can make you cry, lose your temper or be visibly distressed in front of them. While it may feel like a tough call, use some acting skills to put across a poker face, showing no emotion and simply acting as if you're coming across a group of rowdy people.
*Yes, it does hurt to have people hurl insults at you or to make judgments about you in hurtful and derogatory ways. Showing that you're oblivious to their hating does not mean ignoring your feelings. You may want to cry or rant later, to let it out, and that's just fine. It's really good to talk to someone you can trust, to help gain a perspective on things. However, it's also important not to dwell on what these people have said or done; that gives them ongoing power over you. Instead, seek to accept that they are not very nice people but that it's probably because they need help and are likely very weak and unable to improve their lot in life.
Kill them with success.
*Haters and jealous types want you to fail. They are the people who say that something can never happen, that things are impossible, that you're not clever or good enough or that nobody has ever managed to do what you're trying to do, so who do you think you are, and so forth.
*Use their barbs to power your determination even more; think about their spineless attitude to life and how they fail to see that it's effort and determination that make all the difference, not some anointed "born-with-it" miracle powers. Their taunts should make you want to do even better and prove them wrong by succeeding. And remember, success is defined by you, not by others.
*Focus on your strong points.
Always work on your weaknesses and imperfections but do so through your strengths. Do not let what isn't the best in you swamp all that is the best in you, especially not because haters decide to pick on those aspects.
Live alongside your haters and the jealous folk.
*They are not going to go away. Instead, you are going to have to learn to live with them, manage them and be diplomatic around them. By ignoring their jibes and getting on with the tasks you've set yourself, you're moving forward while they remain stuck. Complaining, comparing and carping will not shift people anywhere, other than into their own misery-perpetuating club. Fortunately, you don't have membership to that club, and you never want it, so believe in your abilities and keep working away at what matters to you.
*Be diplomatic. Only talk to haters and jealous people when you really have to, such as for work, for church or for sports meets, etc. Even then, stick to the niceties, the facts and keep it short and very sweet.
*They know that you know that they don't like you but they also need to know that you don't let it bother you one bit.
