Is my mind just playing tricks on me?

Hi everyone. I am single and a few weeks ago while out with friends a guy gave me his number. He could not be less mg type. There is a sizable age gap (which is fine for a lot of people – no judgment from me – it’s just not my personal style), we are socially very different and he could not be further from what I would refer to as “my type” physically. Nonetheless I did find him intriguing and smart and I was a big fan of his big personality so I texted him a few days later. We hung out one time and he texted me a few times after but – even though I had a good time – I was short in my responses bc of what I said above about what I deemed our lack of compatibility – and he eventually got the hint. That was two weeks ago or so. I’ve thought about him a lot since and today for some reason I just can’t get him off of my mind! I texted him a hello/check in type of text and he replied back immediately and we “chatted” a bit. I can’t help but wonder if this is my brain playing tricks on me though as I am a *master* self saboteur when it comes to relationships. I typically run to the things that aren’t good for me and away from the things that are but typically the things that aren’t good for me are the players/guys who are only interested in one thing – and that really doesn’t seem to be this guy. I’m over analyzing, yes, but I really can’t put my finger on what it is about this guy that has me feeling this way and I certainly don’t want to be fickle or inadvertently mess with his head. He’s just not at all my typical go to kind of man! Any thoughts? Thanks!