People suck, maybe it's just me..

So a long time ago I gave up on making friends bc people just always have an excuse to not hangout with me so now that I'm 21 I have it another shot and I made plans with ppl I work with but its no different than before bc they canceled on me. I just don't know what to do I don't want to give up but i just feel like there's something wrong with me that makes ppl not want to hangout with me what should I do?