<human>: Could you distill the essence of the text into 1-3 sentences?

So I (17F) just ended a relationship a little less than a month ago. I liked this guy (20M) a lot, even though he certainly wasn't my Prince Charming, and things were smooth sailing until I had to deal with some personal issues which where things started tanking. I would like to say I was depressed because of said issues, but I'm not entirely certain.

Our main connection was sex, because there was seemingly no other form of communication for us. He was also the first guy ive had sex with more than once, and felt comfortable enough to do it consistently.

That's all it was every time we saw each other, hardly even conversation. I really had no problem with it and obviously neither did he, but now that the relationship has officially ended I can't help but feel like I need him. Like I physically can't bring myself to talk with another guy on a romantic level let alone have casual sex. I just feel uncomfortable with others and he somehow winds up on top of all my thoughts.
<bot>: I don't even like this guy anymore, and I really want nothing to do with him, but I always have this underlying feeling that he's the only guy I can sleep with and feel sexually comfortable with regardless of current relationship status.