What to do ?

Why would you want to put up with that? Every relationship is headed somewhere, right? Either to an end or forever... do you really want to be this unhappy forever? The end sounds like it would be much more merciful to me! You sound like a pretty understanding person and I think you have been very tolerant. You need to choose really quickly if you could live with this forever and if the answer is no, end it swiftly and kindly. Good luck!