From personal experience, there are a few things I'd want to address here.
It's always important to talk about it (if you two haven't already). A calm and civil discussion, maybe something has been bothering him (or you, or the both of you) and since no one is really talking to one another, but avoiding it... Well, that could have led to this situation you're in now.
Being in a relationship with someone else than I was before, I noticed there are differences with how things have been developping.
The situation you're in I experienced similarly with my previous partner. For a long while he didn't feel he loved me (he told me this way later). In fact, he didn't feel a love-connection when we started the relationship. (Whether he ever loved me is the question.) I won't go into personal details about why he didn't want to continue the relationship, but he apparently never really wanted to be in a relationship to begin with. He always put his family and friends first as well.
You can assume I feel a couple of my years have been wasted spending time with this person whow asn't open and honest with his feelings.
I talked with my ex for all those years, trying to figure out what the problem is. With whatever it was (be it the relationship or other things) he was never honest. Never telling me what was exactly bothering him.
See, it can't work out if you get to the talking part and the other isn't being open about what's going on.
I now have been in a ('new') relationship and an amount of time has passed I can start comparing it to the previous one. The person I am with now has always been there for me for years. He always wants to talk with me (sometimes even admitting he wants to talk but isn't sure how to talk about things), and he actually is open about his feelings and thoughts. He also understands me when I'm feeling stuck or down. In fact, sometimes he will stay up for me, even if he has to get up early the next day.
That's something I hadn't experienced with my previous relationship. Of course I don't know how things will go from here on out, but it already feels as a breath of fresh air, especially since I know for sure this time I'm not the only one who is putting in effort into the relationship and loving the other before we actually got together.
If you notice your partner is not honest, trying to emotionally blackmail you, making you do everything for him while he barely gives anything in return... Have a serious talk about it.
See what he says.
But if he continues to this this to you, I would say break it off. It's not worth it. Trust me.
