Can't do this anymore....

I'm getting put back on birth control.. My husband isn't happy in our marriage anymore... He regrets marrying me and just wants to leave.. He is staying for the time being to see if I really change... But I know I'm running on a deadline... If I don't get changed before he comes back from Austrila I know I'm screw :/ I feel betrayed and unwanted... You just don't married someone, and then rip it out from underneath them just because you weren't happy from the start... I just keep crying at random points of the days because I know I will always have issues but he is not even willing to stay :///