time to process, a note that makes clear you're interested to help avoid the inevitable second-guessing, a kind of setting for a get-together that will be conducive to the situation and put him at ease (why coffee works)--these are all excellent pieces of advice.
i feel so fucking awkward in these situations that i get more formal acting, but not a natural kind of formal, because i'm not really formal. i'm just trying to act like i'm supposed to more than normal and i'm pretty awful at it because i hate acting like i'm supposed to. i like letting down my guard, or just being free to wander into whatever spaces i find interesting and funny and aesthetically satisfying. i hate showing my intentions or desires before i know what to do with them, and i'm chronically indecisive so it tends to just make for a natural conservatism and kind of stiff attitude, kind of closed off, distant, etc. in situations that threaten me with potential embarassment. i can easily self-disclose when i am in control, but it's a million times more difficult to really risk feelings with someone else and to feel yourself losing control and watching this person capable of affecting you so dramatically and you knowing that you've relinquished so much of your intepretation of yourself and your imaginary world gets tested with the real world which is risky. also, watch amelie.
i'd suggest listening to ilovelurking (who might as well be speaking for me as well) and domino (who i'm pretty sure would immediately be able to invade my space in a way that i wouldn't resent but instead begrudgingly enjoy).