Regardless of what others may have told you as you were growing up, or what you may have read, or what you watched; the truth is you deserve to be happy.
You deserve to be happy as part of your birthright.
As long as you are not hurting other people or making their life worse, then you deserve to be happy.
Never forget that you have a right to be happy, a right that came as a result of being born.
If there are friends in your life who are taking away your happiness, and making you feel bad and treating you badly; you need to spend less time with them or avoid them altogether.
Toxic people like that in your life will cause you to eventually forget you have a right to be happy. You might not think that people who put you down or treat you badly, will erode into your belief that you deserve to be happy. But the more time you spend with them, the more you will start to forget your birthright that you deserve to be happy.
You deserve to be happy, never forget that. Do not spend time with people who make you think otherwise.