Emotional basket case looking for advice...

So, I know there are hundreds of love conundrum posts like this here but I'm feeling a little lost and don't really know where else to ask about something like this.Essentially, last semester I asked a guy out because he seemed nice and all that, and he said no quite gently and it was no big deal besides the general unpleasantness of getting rejected. I liked him, but didn't know him as well as I could have, so I guess I wasn't very emotionally open about it. However, in the time since we've spent a lot of time together since we share multiple classes and a lot of the same friend group and we've become pretty good friends. The problem is that I'm finding myself having real, strong feelings for him now (the whole "I've never met anyone who even comes close to making me feel the way he does" deal). He dated a mutual friend for a little while, but that ended up not working out.Is there a way I can bring up my feelings gracefully at this point or is it probably better to just try and get over him without letting him know? We both have summer plans that roughly overlap in some ways and we're sharing multiple classes again next semester, so the last thing I want to do is lose him as a friend... but I've never felt so hopelessly in love before. Any general wisdom is really appreciated, as I've always been complete shit at social interactions and really have no idea what to do.Thanks for taking the time to read <3