Hello

I come here looking for help because this is the place that helped me to get over my anxiety and actually get a girlfriend. I'm 19 and my girlfriend is 17. Before we met she was a virgin and 2 weeks into our relationship she decided that she wants to lose it with me. So that happened and as you can suspect it wasn't the best sex I had. Well, following times were much better and I enjoyed them a lot. I guess she did as well as all I could hear was moaning. However she can't last long. To be specific, just before she has an orgasm she stops me and tells me that she can't stand it and cant continue.
At first I thought I am causing some sort of pain but it turns out I'm not. Upon many occasions I was asking her why she does that and all I got was: "I am just like this".
Second issue is that she is not initiating sex at all. She said it is important to her but is not her priority and each time I want to have it I must do all the work. This is sort of similar to our contacts as well, I am the one that initiates them and actually tries to stay in touch.

I would want her to be interested in our relationship on the same level as I am. I think I might be giving her too much attention and this has caused her to take me for granted but I don't know.

My question is: What can I do to be more of challenge to her. To not be something that she takes for granted? Should I just cool her a bit and stop the contact until she initiates it or would that make things worse? I think I might be having a relationship anxiety or something. I know this sounds clingy but I don't want to lose her.

We do not discuss girls under 18 here, regardless of the laws of consent where you are from.

Sorry dude.