<human>: Can you give me the gist of the text in a nutshell?

We were friends, but didn't know each other well until we both moved in to a group house. Being youthful, love-struck idiots, we started dating despite the grimaces of our other housemates. It was a rocky several months, but we stayed together and now we share an apartment, so we have lived together for the entirety of our relationship. 

Our lease is ending soon. I would really like more privacy and more control over my space. I struggle with sharing a bed, with the smell of his cigarettes and weed, and his messiness. I'm only 21 and I've never had the opportunity to live alone. I love him, but I don't see the sense in us living like a married couple at this age.

Those are the basics; emotional considerations to follow.

I'm afraid he'd be crushed and would hate living alone. I'm afraid he'd see it as the end of our relationship, or the beginning of the end, and I don't want that. And yet, part of me is afraid that the very idea means I'll never be able to commit fully to a relationship, even a perfect one. 

He's going through a difficult time and has said openly that he expects to depend a lot on me in the coming year. I don't know that I can be the support that he wants as I am barely getting my own life together and expect to have a very busy year ahead of me. But I love him and want to care for him, so why am I struggling so much that I now want to put distance between us?

But I'm only 21! Yes, it's the same age at which my grandmother married and had her first child, but that's not my life or my world. If anyone has experience with a similar situation, where do you see this going? Am I going to have to make living with him work if I want the relationship to last? I'm at a loss. I don't know whether to blame myself or him or no one. And meanwhile, he's oblivious to the struggle I'm having over this. I can't even stand to bring it up with him yet.
<bot>: I've lived with my boyfriend since before we started dating. How can I even begin to suggest that we live separately, given that I love him and want to stay with him?