Losing a really good friend :(

I used to work with this girl for just under a year, she left about 3 months ago to work somewhere else. When we worked together we always used to have a really good laugh. We talked somewhat on Facebook but not a lot as we saw each other at work, she used to tag me in post about 2 - 4 times a week. Anyways I started to develop feelings for her and she did not feel the same way as I asked. We still talked when she left for her new job and used to talk (messaged) most days for about 2 - 5 hours.

The 2nd to last week we worked together she went on holiday and slept with someone. This really bothered me as I still had feeling for her. I never said anything about it until a month ago. Where I sort of shammed her for doing it, she said she could not look or talk to me anymore as she didn't know what I thought about her. Since then I've apologised so much and she seems to understand a bit of why I said it however she doesn't really talk to me anymore. We are currently coming to the end of talking about it and it takes her about 3 days to reply.

Looking back she was a really close friend and I used to love talking to her until I told her how I felt and she didn't feel the same way. I want that friendship back but I don't think it will ever be the same. I don't know what she thinks of me now. Should I ask? I want to know if she still considers us friends or not...