Ending my engagement

So long story short I want to end my relationship and my engagement to my fiancé. We have two small boys my second son was born May 2016. Things are falling apart and I don't feel in love anymore. We don't sleep in the same room we don't have sex we barely even talk. I sit alone everyday and he gets home from work around 5 we eat dinner then he goes to bed. I moved 16hrs from my family and friends and I just want to move home. I feel like I have no purpose and all I do is be alone. He says I am selfish but I can't live unhappy just to please him.
I just don't love him anymore