Ok so um I don't like my boyfriend like that anymore
1 he's way shorter
2 I like my single life (for now)
3 I don't want to lose friends
4 I don't want his brother& Friends to hate me
5 my parents don't know
And so on...
I know I made a mistake and I want to end it but how?

Your reasons are pretty shallow but you need to leave him alone.
You tell him you don't feel the same way about him and you want to break up.

Your other answer about telling him is really good. Any relationship needs honesty, respect, and caring. Please be honest with him, and just tell him that this isn't what you want anymore. There is nothing you can do about your parents, friends, etc. This is just something that happens to all of us at one time or another, and something we all have to face. Good luck, and hang in there.

If you stay with him you will never will be happy, neither of you will. And everyone can agree that you also don't want to live a life full of lies. Everyone has someone out there in this world, some just take longer than others. Others just don't want to spend time with another person and be adventurous.