Replying to Women complications

i wouldnt be tellin anyone this but its ns and everyones pretty cool cuz they ski like me and no one has any idea who i am... so ive been dating my lady for about 2 years now and shes really cool. shes not the most amazingly beautiful girl in the world but shes cute and has an amazing physique. when we hang out all we do is chill at her house and watch tv and eat...which is cool cuz i mean what other girls like to just hang out and eat a lot of food and still look good right? we talk on the phone a lot at night and never really run out of stuff to say, we get in fights on occassion but have never broken up. i started dating her the summer going into my freshman year and now my sophomore year is wrapping up. lets just say ive done a bit of growing up physically and mentally and now im not such a little douche. anyway ive been hangin a lot with my friend and some other women which i thought were way out of my league. and appearently one of the wants my nuts in or around her mouth. i dunno what to do because my girlfriend never does anything wrong so i have no reason to break up with her, and i still like her a lot. but i dunno if i wanna go thru high school with just one girl and not know what else i could of had. cuz if i leave her and i become some single guy that lost something good i'd feel like a dumbass. what should i do? if you read this whole thing than God bless you.