Jennifer,

In one sentence you say you love him then you say you feel obligated to him. You obviously live together by indicating the budgeting etc.

Did you support him in his decision to get his kids in part custody? It isn't something he would decide on his own if you are in a relationship and if you did support him and tell him you would be there for him, it is vital that you are honest with him now before it goes any further.

He may want a relationship with you to survive and that would alter his situation greatly. Please discuss it with him,

Rhian