What would you do?

So I was seeing a guy for awhile, it was kind of complicated he still had an ex involved and all that jazz (they broke up maybe like a month before we met) but he persued me regardless. This was from about August-November. He told me sooo much about how he felt about me and all this stuff, something my happened with his ex the end of September getting involved and things were different since then. I never slept with him because I just knew I’d get attached and it wasn’t an ideal situation to be attached. Now he just recently moved 2 hours away with a new job about a month ago and apparently was upset to leave me (among obvious other people in his life) and told me to keep up communication, that he would keep up communication, and he wanted me to come visit him and it would make him happy if I did. I agreed I’d come visit him when he asked (I won’t invite myself somewhere I feel rude). His first week gone we talked twice that week, I texted him first. Probably every time since he’s been gone and the few days leading up to him leaving I was texting him and things seemed normal. But he has not once texted me first. The second week he was gone he said he never saw my message and was sorry and we had a small conversation but it felt off. Never heard from him since then, I texted him on Christmas to wish him a happy holiday he wished me the same and that was it. He never texted me on New Years or between holidays so I texted him January 2 to ask how he was and I missed talking to him and *boom* no reply at all and I haven’t heard from him. In the whole month he hasn’t texted me whatsoever yet before he left he told me he hoped we’d be together one day since now wasn’t ideal, he had all these feelings for me, he’d never forget me, it would bother him if I ended up with someone else, blah blah blah. But now he just doesn’t talk to me at all? I’ve never been ghosted before so I mean is this being ghosted or do you think it’s just someone busy and adjusting to their new life? Idk if I should try texting him once more or just leave it alone. He went from texting me a lot and always first to texting me never now. Idk if he wanted to see if I would put the effort in to talk to him since he moved and if I messed up by not reaching out enough or what. I’m just sad thinking of all the things he used to tell me and I just can’t fathom someone claim to feel so strongly and then just disappear.