There comes a point in time when we just have to set some boundaries... and maybe you need to tell them both you want nothing more than for them to get along and love each other.. but that you have done more than your part. they have to do theirs.. and tell them not to call you to complain.. call you because they are ready for a solution...

Let them know how you are feeling.. they will respect you more for it. because all they are doing now is treading water and you are doing all the swimming for them...holding them up... you need to be able to do what you need to do for yourself... like studies...

Good Luck!