I think you are getting some really bad advice here, OP.
You know he is backing off. People don't make a big deal about a phonecall without a text first unless there's something odd going on IMO .If other people are ok with that, all well and good, but we aren't a match, It would not work for me, so I'd be out.
Also, at some point, you will want to move in together presumably. How would he cope with that? Apparently, he wouldn't. So you are looking at a future where you always live separately. That would suit me. I doubt it would suit you. You are not a match.
This relationship has you feeling needy. Healthy relationships don't do that, and your perfectly normal expectations of a relationship have people here branding you 'needy'. I would brand him 'avoidant'. I'm avoidant myself, and being avoidant doesn't make someone a bad person - but stringing along someone who wants an emotionally intimate relationship does. Making them feel 'needy' for wanting more intimacy does.
This is not all on you. But the outcome is the same. I think you will not be happy in this relationship.
Ironically, when you pull away by ending it, as I think you should, he will come running. By pulling away, you become 'safe' for an avoidant.
It will, of course, be tempting to play this game to try to hook him. But life isn't a game, don't waste it playing one.
I think your best course of action is to find someone more suitable, who makes you feel secure, not anxious. Thty's what relationships should be about - feeling happy, not upset.