Being single forever

Is it bad to be single forever? It seems like most people find their "forever" person but I have never found someone like that. Guys I have dated have just used me for sex and I'm not sure what I'm doing wrong. I dont put myself out there provactively at all or suggest that's all I want. In fact I want the opposite yet people use me then when we have sex they end up not wanting to be with me.

I'm 23. Yes I know I'm still young, but it gets tiring dating just being afraid of the same outcome! Like I don't want to put myself out there and have someone waste my time. I dont see myself having kids or getting married. I feel like some people are really just meant for solitude and I am one of them.