Been there done that ...If you stay, life will pass you by before you know it and while spending all your time loving someone who is only willing to love you in this way you could be missing out on Mr . Right....your still young and not many woman would put up with that so maybe that is why he does what he does ..he will never be truly happy but you have many many chances to be so embrace the single life and one day you will look back and say " what was I thinking?" I wasted 11 years with someone who I love very much but just recently ended it because I need to be completely happy and hope to someday reach that point...take care ...hugs