difficult guy

My boyfriend broke up with me and after 2 weeks reached out, we were texting for 2 weeks and he asked me out, we needed to reschedule it due to his work. We met pretty much two weeks ago, it went perfect. He took me to a bar and was very flirty (same as in texts). I could easily tell he missed me a lot and he told me that when he kissed me. We would walk together holding hands and hugging. After the bar we went to his place and we slept together and he made us another drink. He told me some things about his family I didn’t know about and we had great time laughing and talking. Later we went at mine where we spent the whole night. He would hug me and kiss when I was sleeping, he told me I’m beautiful. The next day, around 12:30 he had to leave (so it’s not like he left right after we slept together). He kissed me and said “see you baby”. And I haven’t heard from him since then. I know he is very busy with work but i do not find it fair. I messaged him on saturday being very nice and not needy at all and he read my message when he was offline as so i couldn’t see he read it. He was online just twice since that saturday, just for the moment. Before he got online for the first time after my text he liked my newly-posted picture on facebook which i find veeeery weird as we never do it. We have no contact on facebook and we do not like our posts nor pictures. He still has not messaged me. I know he really likes me though. Another weird thing is that our work colleague (i don’t work there anymore) messaged me two days after we went out (maybe he told him, no idea) and has not replied either and he liked the picture right after my ex did!!! I find it incredibly strange. Do you think he will come back again and he is just genuinely lost or should I just move on? I know there is no other girl and i know he really likes me though he has not texted me for pretty much 2 weeks… nothing since we’ve met.