<human>: We have been dating for about 7 months. In the early stages of our relationship (first 1-3 months) she went down on me a few times. Now she hasn't since then. 

I have gone down on her a few times since then (partially because I enjoy it and partially because I want her to return the favour) but last time I did it I could tell she wasn't into it so I asked "do you want me to keep going?" and she said no. That was kind of embarassing but I guess it's not a big deal. If she doesn't like it then she doesn't like it.

I really enjoyed the blowjobs I got from her in the past but now I'm nervous to bring it up. I want to know why she stopped doing it. I suspect that maybe she just doesn't like doing it which is 100% fine for me. I would never force her to do anything or make her uncomfortable, I just want to know how she feels about it. She has mentioned that she has a "bad gag reflex" but she never has said that in a sexual setting. She has only said it if we're eating or something and she coughs. Maybe that's a factor? 

what is a good way to talk about it? Do I just ask her outright if she will go down on me/why she stopped going down on me? Or do I bring it up some other way? 

To be clear: If I bring it up and she says she doesn't like it, then that's totally fine with me. I just want to know why she stopped doing it. I like to think I keep it clean down there. I shave regularly and shower often, etc.

Provide a brief overview of the text.
<bot>: GF of 7 months used to give BJ's but stopped. I want to know why, so how do I bring it up? I completely respect her decision to stop I just want to know why she chose to do so.