you can do it

There is no right or wrong for everything. Just what you are okay with and what you are not okay with. It is okay not to understand. And it is okay to be different.. It is alright to be different.
Being different means that you can create a niche for yourself... You will be specially known for being that particular kind of person... :p You will need time to get used to being okay with yourself. But it will work. Reminding yourself that it is okay, is one of the ways to help.

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You will never really understand why others behave the way they behave, why they think the way they think. This is all because you have not see the things they saw, experienced the things they experienced.

There is no need to find an explanation for everything... Sometimes, everything is just the way they are. Knowing how things work, doesn't change what has happened. Boundaries are set by yourself, especially those of the mind. So if you really want to feel better, the first thing to do, is stop reaffirming negative thoughts to yourself. You can try to make it a habit to stop yourself whenever you catch yourself saying negative things. Maybe you can punish yourself by giving your friends a treat whenever you feel negative.... :p You should be able to recognize what is negative and what is positive... Keep in mind that, things will change... Things will get better. There is no explanation... but it will happen.

( Maybe negative things will happen, but you do not have to keep reminding yourself that they did. It will not help the situation in any way. You can find a way to allow yourself to feel better. But if there is no way, just leave the problem at a side and go back to it when a solution appears.) ... Stop telling yourself that you cannot do it because it is difficult. Give yourself a chance to feel better.. tell yourself you can.