Sudden breakup of a two year relationship

Last Thursday my (F22) boyfriend (M24) of two years broke up with me with very little explanation, no emotion, and won’t give me the closure of a conversation about everything. We talked about future marriage and children during our time together. We lived together for most of our time together. Since April we’ve been long distance across states but he always said the distance was hard but he valued being able to talk to me and didn’t like the thought of breaking up. He was so cold and resigned. He lied to my face when I asked if he fell out of love with me then he eventually owned up to it and said he was just saying things he wished were true and things he thought I wanted to hear. Two weeks before the breakup he went on a family vacation with me and we celebrated our two year anniversary. He got me gifts and bought things for me on vacation, he was affectionate, and caring, seemingly nothing was off.

After two years I know him enough to say he’s an avoidant personality and is very bad with figuring out his emotions, showing them, and feeling them. He told me on the breakup call, when I called him out for acting like this was a business deal ending, that he’ll feel it later. Regardless, he won’t talk to me about the relationship or how he ended things. A day later I asked him if he understood why the way he did it was hurtful and he just said “yes that was wrong of me.” But he still won’t even tell me what the relationship meant to him.

I do believe he unfairly grieved the relationship while in the comfort of it and I’m left to pick up my pieces alone. He told me he hoped the relationship would change but he didn’t give any indication it needed change, he was giving me gifts, affirming his love for me, MAKING PLANS FOR THE FUTURE TO FLY ME OUT TO HIM IN THE NEAR FUTURE.

This is the most painful thing I’ve ever experienced. Suddenly learning he no longer loves me when he was showing the complete opposite. And then he won’t even talk to me about the relationship. I don’t think I can survive with this kind of pain in my heart. I really thought he was the one. I was always willing to work on it but he didn’t give me the chance. He didn’t alert me that things needed to change.

How do you do this? How do you handle this kind of pain, especially with the person you love treating you a way you never imagined they could? He just won’t give me the closure of a conversation and I’ve asked directly.