Is she a fuck buddy or does she still charge?
Why don't you just ask her outright if she has 100 other guys on her each week?
And lastly are you comtemplating going commando on her without protection?
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Stay safe and use a condom.
I have been in the same situ as you but it did not last long, I only visited the girl 3 times at motels, it was getting uncomfortable as she was asking too many personel questions. I sensed that she wanted a relationship, also wanted unprotected sex.
Ghost cards are your best friend.