Causal Relationship?

So my(long distance) boyfriend broke up with me. And his reasoning for doing so was because he wanted to be alone. He doesn't like the commitment and expectations (that he puts on himself) that comes with our relationship. But, he still wants me in his life and he said that he feels himself resorting back into being a loner, and he doesn't want to do that.

He's basically said that he doesn't think we can work through it. He doesn't feel like it's the right thing to do. I can understand and respect that. But I'm finding myself really really missing a part of our relationship that I didn't expect myself to; the sexual part. I mean, I miss the flirting, I miss the sexting and the sending pictures back and forth. So, I came up with the idea of maybe proposing a casual thing to him?

No commitment, no expectations, no requirements but all the fun. He would still get his alone time, and we could still have that really intimate, fun part of our past. I'm just afriad that I'll bring it up and he'll reject the idea and not wanna have anything to do with me. But I also feel like he'll go for it?

Is this a good idea? Should I ask him? Any advice is greatly appreciated!!