Help with ex please!!?

So me and my ex dated for 3 months then broke up cuz we fought alot. We then proceeded to be friends but all the sudden she quit texting me. While we were datin shr sent me a pick of her in very skimpy clothing and 3-4 months after we broke up she found out i still have it and still like her. I wana be her friends sooo bad!!! please help guys