<human>: We met last year and pretty much fell in love instantly. Moved in together after a few months and it's been the greatest year of my life! When we started dating the topic of kids and marriage came up early (naturally) and she's always wanted both. I have a daughter from a previous horrible relationship who I'm never allowed to see simply out of spite on my ex's part. Needless to say that has messed me around a little as I'm in no financial position to fight it (as much as I wish I could). 

At the time I was open to the idea if I was to meet the right girl. However as time as passed, the idea of it terrifies me and I know now that I just can't do it.

The problem is that I absolutely adore this woman and want to spend my life with her, and I know she wants the same. She's started talking engagement and kids within the next few months and everytime it comes up now I try to subtly change the subject (she hasn't noticed that yet). I know that the relationship is doomed as I could not bring myself to try and stay together and rob her of the chance to be the incredible mother I know she'll be. 

I know what needs to be done and I'll be telling her tonight, I just don't want us to end, she really is the love of my life and I can;t picture my life without her.

How do I even begin the conversation that'll pretty much ruin my (and her) life??

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: !: Telling the woman I love that I can't provide the two things she want most in life and pretty much end the greatest thing I've ever had......Please help!!