<human>: Condense the text into a few key points

So I think I'm pretty good at cunnilingus. However, I am frequently getting my girlfriend to what seems to be like 90-95% of the way to orgasm but suddenly she squirms and closes her legs because it gets too sensitive or something?? 

I have reached this point many times but it always seem to end that way. Is it my technique or is she just not following through because she can't handle the sensation. I don't really know another way of describing it. 

My techniques are basically tongue on the clit plus two fingers inside stroking the gspot. It works wonders. Sometimes it ends when I accidentally poke her too hard in an awkward angle when's she is close to orgasm and that is freaking annoying too because it takes so little for her to lose it. But generally it's her legs closing and since I'm down there I keep going until she says no more. 

Help me out! I've gotten a bulk of my tips from reddit and for the most part it's amazing advice.
<bot>: fingering and licking my gf but she closes her legs because it feels really good but she doesn't orgasm.