Cheer up man. Life could always be a lot worse... if I think someone is only wanting to be around me cause I have weed, I make it a point to not smoke with them. Sometimes I get annoyed from my 2 roommates hitting me up to smoke them out all the time. It happens at least once or twice daily. I'm pretty generous, one of them is my brother and the other might as well be... but it's an expensive habit for myself, much less 2 other people. They buy weed too, one of them more than the other, but it's always brick weed. I kid you not one day I get a txt while I'm at work saying "hey can I roll a small J if I give you $5" Sometimes when they ask I'll get kind of snippy letting them know to chill out on the bumming...
If you don't like who you are then change. If you don't want to change then keep being shallow and just find other shallow people to hang out with so that you have something in common and will get along better. Once you accept yourself for who you are you will be pretty content with life.