<human>: Can you condense the text into three sentences or less?

We've been together for close to a year now.  We share an apartment with another six months on the lease.  

We were on vacation over the summer, and the topic of marriage and kids came up.  She wants to be a mother more than anything.  We talked about a future together and I pretty much said maybe we could give it a shot some day.  

Well, since then I've done a lot of soul searching, and the truth is I don't want kids.  I'm not sure I even want to get married.  It's not anything specific to her, I just don't think that's the path I want to take.  

I know it's going to devastate her when I tell her.  We can't stay together.  We want polar opposites, and as long as we're together I'm going to feel guilty, because I know I'm holding her back from meeting the man who is going to give her the kids she wants, and let's face it, she's running low on time.  

We have another six months on the lease.  Do I tell her now that I think we should split up?  What do we do about the next six months?  I'll be fine living in the apartment by myself, but she doesn't make much.  It's going to be difficult for her.  She's welcome to stay until the end of the lease, but I'm worried it will be incredibly awkward until then.  

Any suggestions?
<bot>: Girlfriend wants kids.  I said I did too.  Changed my mind.  We have an apartment together.  What do I tell her?