Oh! I am also married and I feel that i am not inlove my partner anymore but I'm still show to my partner that I am still care and love  because we have a child and yes because of the commitment. Sometimes I want to quit especially the times that we're not in good terms . I feel pity  to my self cause I feel I'm not free for what I want to do and I'm only fooling my self for doing a things that suppose to be don't. I think if I can afford a divorce I will file. So for me you need a divorce married without love is like a big shit! and if your partner did not do the responsibility it means there is no love anymore. So divorce  is the solution for you to be both happy.