How do you keep the spark alive?
I have been in a relationship for more than 3 years now. Sex was good and we were both equally horny. Slowly over the last few months my girlfriend has turned cold towards sex. My libido is generally very high. The problem is she never initiates now and whenever I bring it up its always about me not doing anything she is not already anticipating. I've tried doing multiple new things like staycations, longer foreplays, different ways to turn her on (maybe I am missing a few things because I can't put it in words). the problem is its always one sided and most of the time I get shot down even before it begins. So my question is for long term couples how do you keep it alive? how do you keep yourself desirable? I have been feeling very unattractive recently due to being turned down almost every time. Suggestions welcome.
For people who are going to say that she is cheating on me or whatever. I am 100% sure that is not the case.