Guy problems!!! PLEASE ANSWER!?

so, me and this guy have been, well, "sex buddies" for like two months. after we're done doing the do, he wants me to stick around so we can just chill and talk about life. at first, i didn't know how to respond (i wouldn't really open up) because in public he would ignore me despite a lot of people knowing. but every time we kept going on, i felt more attached to the guy, even though i was moving away. and the last time i saw him, he didn't even want to do the nasty- he just wanted to sit in the park and talk. so stupidly, on the last day, i fb messaged him and told him i liked him alot (i did the whole time, i just didn't allow myself to have feelings i guess) he never responded. now i think about him all of the time and question if i'm in love with him or not. now i'm moving back and don't know what to do because i'll be seeing him again... because we work at the same place. what should i do?