<human>: The [21m] guy I [21f] recently called quits on his relationship. It was long-term, but there was a lot of issues involved between her ex and things so they'd been wanting to break up for a while, and finally did. I guess they were both pretty over it by the time they called quits. (so I've hear friends keeps saying) I know that he was interested in me since before the break up (never tried to cheat or anything, but did admit interest to his roommate about me). 

So the question is that I'm not sure ho to go about pursuing him. 

Do I give some time and wait a few weeks or months, I'm afraid he may think I'm not interested?

Do I ask him out soon enough so that he doesn't end up with someone else, but I'm afraid I might come across clingy or pushy or something?

Advice would be really appreciated!! I did say we should hang out and he asked if I was planning to a frat event a few days ago. But I wasn't planning on going, he asked really short notice but didn't invite me either. (Sarcastically told me he didn't care if I came. Very sarcastic person) But I also know he's going a lot and enjoying being single which is good, I just don't know how and where our interest for each other falls in between the break up and the single freedom...

Sorry if this seems so stupid. I'm just not very experienced with dating/relationships, I'm much more used to casual sorts of things.

Give me the gist of the text in a nutshell
<bot>: Guy who likes me and I like back is single after long-term relationship with issues. Not sure how or when to go about hanging out more or pursuing him?