I dont know if I'm putting this in the right spot

hmmm I'm not sure where to start with this. an old friend is in town and she didn't have my number, I'm not really on fb and I don't have messenger app. she never posted on my wall about it, she knows who I'm with and she knows how to contact my best friend as we have all been great friends. so anyways my ex husband ( well soon to be ex husband, I have to come up with the money for the default to divorce him ) texted me saying that she wanted my number and that she was in town. I didn't respond 1 because I hate this man and 2 he won't divorce me and 3 she knows where I live. I would like to see her, yes, but at the same time why the duck would you go through that asshole who won't let me go. any advice would be awesome. like do I tell my ex ya l wah give her my number do I put the app on my phone and contact her myself or do I just let it go? ive also been kinda depressed and started to see a counselor because of it and I really just want to tell everyone to fuck off