Please help

Perspective (me 21F him 23M). Okay so i recently just spent the last 4 days with a guy that i’ve known for the last 3 years. 3 years prior we had feelings for each other, (FaceTime every night no matter where, slept together, never slept at house, long conversations etc). it just fizzled out i guess (slightly talked about this over the last 4 days, miscommunication on both ends, told me he missed me) Over the last 4 days we had had sex, he stayed the night with me every night even having to work and had very good hilarious and also very deep conversations. I will not lie i have a very soft spot for him and always have, after leaving today to come home (3hours away) i find myself thinking about him a lot. but he’s only messaged me twice since. i know he fell asleep (he told me), but I’m just so in my head which is very unlike me. Can i get some advice? please be kind as this feeling is all new to me.