Is anyone else tired of being treated like garbage?

I know I am. i find people who i become good friends with, get real close to, sacrifice my time for to do my best to help them out, and basically give my life for them and they tell you theyll be there for you when you need them and make you feel like they really care about you as much as you care about them, then they slap you in the face by ignoring you when you try to talk with themand treat you like your not there any more and make you feel like everything youve done was worthless to them and didnt mean anything? i feel that way. i wish i had at least one person that i could call a friend. a friend is someone who has your back just as much as you have theirs, they at least attempt to give back what youve sacrificed and given to them, who is gona back you up n not put you down, who treats you like a person, and just simply cares. I get tired of thinking i found friends like that n then later they hurt me by not following thru with things they said and not talking with you. wheres the respect in people. im not really asking a question im just venting i guess. im just tired of being the only one making an effort in the lives of the ppl i know. im tired of one sided relationships. How do you find someone you can call a true friend? id really like to know cuz im tired of being heart broken...