<human>: I just need to talk about this because I feel like a monster. I feel like absolute shit and my heart is broken. 

I (25f) just broke up with my boyfriend (25m) of 3 years. He has a 7-year-old son. He has full custody of him and the birth mother is not involved at all. So, I have taken on the role of "mom" since he got custody 2 years ago.

I never wanted kids. Full custody was a surprise at the time and when he heard the news, I was on a spring break cruise with my best friend. I left for that vacation a college student and came back a step mom. My whole life had changed and for a while I thought that I could handle it because I loved my boyfriend so much that I could take on "the package deal."

The past two years have been trying, to say the least. At first it was fine. But my boyfriend was working seconds while I got a 9-5 job after graduation so I was essentially raising this child alone 5 days out of the week, including every weekend. I've lost any semblance of a life I had because I never had time for friends or hobbies. 

I want to travel. I want to live my life on my own terms. I don't want to organize play dates or daycare, buy school photos, plan dinner every night, or talk about Minecraft anymore. I know how petty and stupid that is but I can't do it. 

I left my boyfriend. What's making this so difficult is that if he didn't have a child we would probably be together forever. He's a great person. I love him so much. He is broken over this. He's a mess and I hate myself for that. But part of being with him includes being a parent and that's not who I am or ever will be.

Can you give me a shortened version of the text?
<bot>: I had to leave the love of my life because he has a son and I'm not ready to be a full time parent.