How can I rekindle my friendship with my best friend?

I had the same best friend from 5th -12th grade. Right out of high school I got married and got my own house and my best friend moved in with us. My husband and her didn't really get along and she and my husband worked separate shifts. We ended up asking her to move out after only a few short weeks. She was very upset about this and I think this is where the problems started. We kept talking but we were not as close as before. She and I both got pregnant around the same time and my baby was born perfect. But unfortunately she had a late term miscarriage and I think she feels I wasn't comforting enough. That's kinda where or contact ended. A few years later I texted her and said I wanted to hang out sometime and she texted back "how did you get my number?" I told her how I wanted to be friends with her still and she didn't really say much back. I see her occasionally in the store and I say hi but she acts really uncomfortable and now I'm wondering what the next steps would be. We also have a lot of other cultural differences. We are both catholic but im white and she is mexican. I was always welcomed by her family but she married a man who doesn't speak english so I cant try to get to know him and show him Im not a bad influence or something which might be the reason she doesn;t want to hang out.