Repeated Cycles

I (22M) and my talking stage (18F) which I was about to ask to be my girlfriend on our next date had a conversation where she said “ No sex before I'm 21 years old I need to at least get to 21 do u think u can be OK with that?... “

Honestly at this point i have been through this so many damn times whereby the woman I’m dating says no sex until 3 months / no sex until marriage / no sex until a certain age it’s always no sex until a certain thing and every time that I have been through it I always and I mean ALWAYS found out that they were sleeping with someone else at the same time.

and some would ask why am I even asking this question it’s because this one is different this a relationship that was arranged my mom and her been friend for years and one day they decided that we meet and the way we clicked on the first day was crazy because it felt like we met before and it felt like we were jus catching up whereas that was the first date and from there everything been good and perfect until today when we had this conversation I really love her and we both come from the same country as we are in a foreign country and I want her to be my girlfriend but if this is what it is then I can’t , and it hurts me a lot because i have clicked with someone and have so much in common with but I’m tired of being the nice guy , I’m tired of being used, I’m tired of being the guy who understands, I’m tired of being patient, I’m just tired I cannot keep doing this it’s like a repeated cycle at this point I think it’s me , I think that I have a problem because I keep attracting the same people