Dear Shay,

I'm 18 years old and I have a confusing problem.  I started to talk to my ex-girlfriend back in December and I didn't plan to get back with her cause she already has a child from another guy.  Since then she has wanted to be more than friends.  We got together, but she left me in late January and went back to her ex-boyfriend.  Then in February she called and told me that she is pregnant with our child.  Then she went back to her ex. 

My mom doesn't want me to be with her because she has a child. My family will probably stop talking to me cause this child might be mine and I am the oldest in my family.  I don't know what to do.  I’m thinking about staying with her until the baby is born and then leaving if it’s not mine.  However, if it is mine I don’t want somebody else to take care of my child because that baby might love that other person more than me.

What should I do?