There is a woman I love who has mental problems.?

There is a age difference between us for sure. However in the last several years she has had many boyfriends, she is very religious, she has been engaged several times and all of them ended up broken off. I have maintained a long distance friendship with her but very seldom did I hear from her however she I think always knew how I felt about her. She recently started to text me. The texts were usually late and she would never answer her phone when I tried to call. the text started out mildly sexual and with every one became more sexual until a few nights ago when she got very explicit. I being religious as well should have stopped it from going as far as it did, but now it seems she has decided to have no more contact with me. These texts were not my idea and while both of us are very religious and I know it was a mistake I do not feel like there was reason for her to kill the relationship as she seems to have. I have heard from others that she is crazy and would either bother her boyfriends with over indulgence I guess you could say by text to them at all times or never commit after having expressed love for them. I know this is not much information but I am hoping someone could help me figure her out. Or why she has done what she has.