<human>: Condense the text into a few key points

so
i have kinda liked this guy since i was like a freshman (he was a junior at the time), but i of course never expected anything to come from it, esp since he had a girlfriend. 
[we are both INTJs, if that helps. and extreemely similar]

after being broken up with for about the 3rd time by the same girl, he started talking to me more often. I, obviously, didn't think about the fact that they just broke up and the possibility of me being a distraction at the time.
anyway, i found out through a mutual friend that he had liked me for a while (idk if there was any overlap with his previous relationship) and so we started talking.

im not exaggerating here-- we talked almost all day, every single day for three months (this summer). finally after a long time of waiting, he asked me out. 

now, my doubt is starting to flood in. i think i might be in love with him but I'm very wary of expressing most of my emotions usually -even with myself- and with something as serious as this, i cant help but think that im being used (maybe subconsciously) as the rebound, in an attempt to get over his ex.

im relatively good friends with his friends and they are unsure of his intentions either, since he's pretty private.
does anyone have advice as to where i should go from here?

im seriously really scared to ask him, but i guess im more scared of his reply.
<bot>: he started talking to me right after he was dumped by his longtime on/off gf and now we are dating.