u/Gullible-Cancel-7302

Long story short, I am dating a girl that is pregnant from an ex. She has zero interest in the baby daddy and is committed to me but there’s a small part of me that cant get over the fact it’s not my kid. I’ve established that I do not want to be involved with the kid until a certain age and I’m still set on living my life the way I planned. Is there any way this works out? Or am I setting myself up for a heartbreak.