Im falling out of love with my wife and i feel terrible

I dont know where to start...Me and my wife got married when we were very young she was 18 and i was 19 it was kind of a dumb decision but we did it and here we are 11 years down the road. She is a great girl and attractive and treats me good but our sex life has dropped off quite a bit in the past 3 or 4 years. i have tried all kinds of things to spice it up a little but she wont stick with anything...sex toys, movies and even role playing but she says shes not into it. She is bisexual and really wants to be with a girl and i am really supportive and we even agreed to be in an open marriage so it would be fair to both of us. i have met a couple of girls since then and it has really opened my eyes to the whole situation and made me realize how boring she is in bed...for numerous reasons. she hardly ever initiates and always waits for me to and for one she doesnt ever like much foreplay at all she wiggles around so bad i can barely enjoy myself als o she doesnt enjoy me fingering her, she cannot stand her breasts touched or kissed on and she almost hates to give me oral which isnt that bad but it still kind of sucks no pun intended. we got in a huge argument one day and i said that she really needs to try to help herself get in the mood for me so we can be able to have sex a little easier without it feeling like im the ony one who wants it but that didnt last...she doesnt like touching herself much that way so that didnt work. she told me if i wanted to that she would never tell me no but i cant do that it just feels fake and im tired of initiating it. she said that i should accept her the way she is because most married men dont get it as much as i do...i dont masterbate i just cant do it so that is out of the question but her comment kind of hurt my feelings. she asked me if i would end an 11 year marriage over sex and i felt like crap because i didnt know. is that a good enough reason to leave someone or am i being selfish? i just dont know what to do i feel like im missing out on so much but i cant just tell her i love her anymore and tell her to get out but im afraid the love is fading and i just need help...please someone tell me what im doing wrong

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