<human>: Can you provide a brief overview of the text?

Out of nowhere I got a random message from this girl that went to my high school (3 years ago) and since then we've been having a few conversations from there. I never really talked to her during high school but we knew of each other and lately we've had a few late night convos, one till 4am and last night till 1am.

One weird thing was I said to her "I have something serious to tell you" which she replied "my heart dropped when you said that," I had a joke lined up though.  

I just don't know where to go from here. She said for me to message her If I'm ever bored or want to talk to her. 

There's time when she calls me "silly" or "mister" which I think is good but then next minute she calls me "man" or "buddy." I just think it's so hard to judge whether she likes me or not over FB messages. 

I'm not sure if she's really nice or if she does in fact have a crush on me too? 

I want to organise to catch up with her. Where is the best place to do this? Coffee?
<bot>: can't tell if she likes me over FB messages and wants to know how to organise an unofficial date without coming on too strong