<human>: Can you summarize the given text in a few sentences?

Hey, so here's what's up:

*Met girl who is 1 year younger than me (she's 19 I'm 20)

*Ask her out on a couple of dates

*She's pretty innocent and hasn't had a real bf before

*Says she wants to by my gf

*I tell her I'm only looking for something casual but I'm happy to keep going on dates with her

*She agrees and we've had sex a few times now

*She keeps on dropping hints like 'when we get married' and 'You're my first boyfriend' that first of all set of red flags for crazy and make it pretty obvs she wants to date

*I have no intention of dating her and I'm actively looking for other girls

Do you consider this taking advantage of her? I told her straight up I didn't want a relationship, but I think that she didn't accept that. When the time comes to move on, how can I let her down really easy? If this happened to one of your friends would you feel they were betrayed or would you feel that it was all above board?
<bot>: banging some girl, she wants to date, I don't want to date, still want to bang her for a while. Am I in the right?