Do Breaks Help??

So, my now ex-fiancé and I are expecting our 2nd baby in December. Our relationship had been rocky for a while, we would’ve been celebrating our 7 year anniversary soon. We both got caught up in the motions and routines of life and parenthood that we slowly but surely started neglecting each other without even realizing it. At the end of July, he decided he wanted to take a “step back”, in our relationship. To him that meant no sex, no physical intimacy. This resulted in us taking a break but still being together. He has struggled with his mental health all of his life, and expressed that it was starting to get bad again. He’s since started therapy, went through a couple medications. Hes been on meds before for depression and is scared of how he’s going to act once they up his dosage (which he believes will happen soon). He says he doesn’t want to hurt me or our 3 year old son (emotionally, not physically) while transitioning to the higher dose. So, he suggests he move out, stay with his mom. Says he doesn’t see us having a future together if he stays living together while this is happening. He seems so eager to go and it’s honestly breaking my heart. I love him more than anything and the thought of him not being with me after so long of waking up next to him is more than I can handle. The only thing is, we keep slipping and end up having really long hugs, kisses, and occasionally, sex. I’m hoping that the time away will strengthen us and make us remember that we do in fact love each other and can’t be apart, while he also heals and adjusts to his medication.

He also has plans to come and stay and be with me as much as I need after our daughter is born. He’s not just leaving me high and dry but just needs his own space, but neither of us is sure if we can work it out and be together later.

Has anyone been this deep into a relationship,(kids, mortgage, almost married), and took a break and the break actually fixed things?? I’m trying not to keep my hopes up but this man is my best friend and love of my life. It’d be selfish of me to not give him his space and it’s give up and move on so quickly, right?