Just venting

I really need to vent I am a 26 year old mother of three ages 8,7 and 5 I have been with my fiancé for 3 1/2 years he is Almost 29 and he has no kids of his own. I just has a tubal reversal in June so we can try to have a child of our own and that has been stressful enough on me and I would say no stress on his end but I feel like giving up all he wants to do is work come home and play Xbox all night he plays in our room and keeps me up all night taking to his friends and playing his game!!! On his days off he does the same thing for hours he don't even leave the bed sometimes just to go to the bathroom I am so over it I'm so frustrated with him i feel like I'm his maid!! He only wants anything to do with me when he wants me to wait on him or have sex but He Ignores me and my kids all day they love him and look up to him their dad isn't in their life much bc he lives 6 hours away!! I know they are not his kids but he should want to be a father figure to them! It breaks my heart I still feel like a single mom😣 I just feel like leaving im getting to the point of not caring anymore my kids and I deserve better then this but I love him 😢  I have told him how I felt over and over and obviously he don't care bc he hasn't changed a bit all he says is I complain to much at least he's not into drugs or bar hopping