He wants to try again

Magaly
I'm going to see my ex for the first time tomorrow after 2 weeks of being broken up because he cheated on me &got another girl pregnant. 
We still text once in a while &he told me that the girl he got pregnant doesn't even speak to him &that he had sex with her the time we were on a break for 3 weeks. 
&he is encouraging her to keep the baby. He said that its okay if she doesn't talk to him but as long as he is part of its life he will be okay. 
He wants us to meet tomorrow &talk about what's going to happen between us. He said he wants to try again &I don't mind, I want to try too but when I had a pregnancy scare he wanted me to get an abortion. It got me thinking.  
How can I be with someone who is having someone else's baby but encouraged me (ex girlfriend) to get an abortion? How can I still love someone who wanted that for me?