I want to cry! I'm so exhausted 😭

I just want to sit around all day and cry. I feel so unappreciated and exhausted. I give 98% in my relationship. I'm ready to move on but I feel he needs me and like I will be a bad person if I left him and my son wouldn't have his dad and mom together something I never had But I also feel like I shouldn't care especially since I don't even feel I love him anymore. Also his family is the closet thing I ever had to a family I love them more then him but I feel like if I continue on I may lose it and breakdown physically, emotionally and mentally. I just wanted to vent no one not even family knows how unhappy I am. I'm so great with holding it together and faking the funk around others every one thinks I'm so lucky. Its so bad I decided to start therapy immediately after the holidays. I'm just so sad. I'm just so tired of giving so much and getting nothing in return I'm just so exhausted 😩