ah so im coming up on 2 months with my current girlfriend, my usual breaking point in all of my relationships. now my old lady is attractive, she has a great body but most importantly, has an incredible personality. anyways we have a good amount of sex (well fuck every other day like 3 or more times in a sitting plus 30 minutes or so of foreplay) and I myself am a fan of performing many different positions and techniques.
shes always been down to try my positions and fun little tricks, but thing is ive realized lately, that she isnt into getting kinky at all. ive been looking for ways to get her going loca so ive been a lot rougher when we fuck (ive been taking it easy on her, shes not my last girl

) but i can tell she isnt into being thrown around as much as i like pushing her up against a wall and holding her hands behind her back. seriously though i used to be way into knife play and if i ever brought that up now, hahaha id just get stonewalled..
now my main concern is her favorite session is straight up missionary for 20 minutes, then flip sides and keep going. i mean god damn im looking to get buck fucking wild in bed you know? it seems ive tried all the positions and fun things i love but all she wants is basic shit... its depressing.
so basically what im asking is what are some simple ways to spice up my sex life right quick? i know shitty sex is a doomed relationship but what about boring sex? does that just lead to marriage?
thanks guys.
oh and for the record, im a very giving partner and she cums each time, i make sure of it.