Boy troubles? Or just overthinking?

Okay so me and my man have been together since September of last year. We split in December because of lack of communication and when we decided to get back together in January the one thing we agreed on was to communicate more and to be more open with how we were feeling. Well, I did just that I told him how I was feeling and if anything it didn’t bring us closer it seemed to pull us apart! We were talking everyday every chance we got but now we hardly talk. If we do talk it’s right before he goes to bed and all he says is “I’m going to bed, gn”. Me trying not to loose him brought it up and all he said was that he’s busy......maybe he really is just busy and I’m overthinking everything but I can’t help but think that there’s something he’s not telling me...and I’m honestly scared to find out...what should I do??!!