<human>: Well, it seems that as of late I just don't flock to her advances. I don't want to sound cliche but it almost feels like I'm "old" and have to "be in the mood". I'm 19, ever hear of a teenager NOT wanting sex? I can tell it upsets her we've been together for 6 months and I'm not jumping all over to have sex. It's not even entirely that I don't want to have sex with her, but just sex on general. There isn't any defect in my ability or appearance, she's told me she likes my body and how important it is that she does. So something is wrong with me? Why don't I want to have sex at all hours of the day and night? She has spent the last 2 weeks living with me, so it's just us and we are in college. Shouldn't I be like... Sex Sex Sex all the time?

Can you condense the text into a few key points?
<bot>: I'm 19, my girlfriend is 18 and I am not entirely interested in sex after 6 months of dating. She's been living with me basically too.