Confusing feelings

So, I recently hooked up with an old acquaintance, it was great and we decided to meet up again. This past weekend I hung out with him and stayed the night at his house. Since then, I’ve gone from just seeing this guy as a hook up to realising he’s literally my perfect guy.

Both of us agreed at the start of this that we don’t want a relationship, and he’s leaving to do his basic army training in a week so I just thought it would be a fun fling. Now, we’re being super affectionate with each other and I’ve realised he’s got every quality I want in a guy. I instantly feel comfortable around him and we were both sober the whole weekend and still had so much fun. I find it so hard to say goodbye to him. Both of us are upset that he’s leaving and so we’ve been talking about seeing eachother again when he’s back from his training.

I don’t really know how to feel, I know I don’t want a relationship but I can’t stop catching feelings for him. Do I just let things go and see what happens or should we figure out what we want to be?