Super sad boyfriend advice?

So this is really sad for me to write but I feel like my bf and I are really growing apart. Which hurts a lot because I really do feel like I love him and I just think maybe he doesn't love me that much. We've been dating for a few months and have always had some rough patches, but the last few days for us have been hell.

He's incredibly busy with his classes. He always says he's drowning in work and has absolutely no free time. In addition, some of his close friends are going through some bad stuff with their families and he is having to make time to spend with them.

I try to make it a point to reach out to him and let him know I'm here for him. But he seems like he doesn't want to talk and if I say something that accidentally upsets him, he pushes me away. But we all say slightly insensitive things on accident sometimes, but I'm the only one who gets in trouble for it.

I feel so selfish saying it but he just isn't making the time for me. He's irritable and lashing out at me and I'm so glad he's there for his friends but another part of me is like...what about your girlfriend? Why can't you make the time for me when I'm worrying myself sick about us and crying myself to sleep at night because we're fighting?

Likewise, when he comes over at night, he'll instigate sex and when we're done, he won't really say much to me. I know he's tired but that hurts. And when he texts me first it's almost always about how rough he has it.

What. Do. I. Do?? It terrifies me that maybe he doesn't want me anymore but he assures me he does. I'm just hurt and worried and sad and anxious all the time but he doesn't have the time to talk to me (even though somehow he has time to talk to his friends.). Any advice, words of encouragement, or similar experiences would be appreciated. I don't really know what I'm looking for here, but my heart is breaking. I'm desperate you guys please.