<human>: Can you give me a shortened version of the text?

We've been together for about a year and a half, and we've lived together for 9 months.  Our lease is up in April.  

We love each other, but we want very different things in life.  Mainly she wants marriage and kids, but I don't want to be tied down.  We've talked about this before, but I think she believes she can convince me to have kids and pop the question.  

I feel like the only chance she has at the life she wants is if I take the plunge and break up with her myself.  I hate to think that she will miss out on having children because she loved me.  She would be an amazing mom.  

Anyway, she just got a major promotion so she's in really high spirits.  Our lease is up in a few months and she wants to start house shopping with me.  

I really don't want to spoil her joy--she's been down in the dumps, but I really think it's in everyone's interest if we go our separate ways once our lease ends.  

Should I tell her now or should I wait a while?  I was thinking of giving her a week.  I don't know if that's right or not.  What do you think?
<bot>: Need to breakup with my girlfriend, but she's celebrating a major promotion.  Don't want to ruin this for her.  Should I wait a week to tell her, or should I do it now?