@lostinyoureyes Thanks! Without knowing the nature of your relationship, it’s hard to say when it would be an appropriate time for you to see him again. But I’d suggest getting together a group of friends for some kind of fun gathering, then casually invite the guy along, as you would a friend. (I think I saw another post by you… you’re having trouble coming out of your shell? Are there any acquaintances that you want to get to know better? This could be a perfect way to get closer to some new people.)
It’s totally innocuous and lets you test the waters with this guy, and if he can’t make it it’s no big deal, because you will still be having a fun time. This means you can have less anxiety about asking him out than if your whole plans for the night depended on him, as in a one-on-one date. It lets other people see you together, so you can get a second opinion on whether this is just a problem with your chemistry.
You’re probably giving him the impression that you’re not too into him because you’re nervous around him. I would do the exact same thing, and not be able to help it, to keep from getting my feelings hurt. You don’t have to flirt with him or make it clear that you’re necessarily interested in dating yet. Just be warm and friendly toward him, and show that you like him as a person, at this stage. That will make him more comfortable around you, because it sounds like you might be purposely being cold to him so he won’t suspect anything about your feelings. If you can start hanging out with him just like he’s any other friend, you’ll get more comfortable around him.