If it’s real love it will come back?

Me and my ex have been broken up for 3 weeks, I knew he had depression and I knew a few years ago that he really lost control and went what he call’s ‘crazy’ but besides this I have never dealt with him being depressed, he has been taking pills and upped the dose but it hasn’t worked. He has said that he need’s to be alone to figure out his life and it’s easier not having to worry about anything else and that he’s not okay, he said he need’s to handle this on his own. No begging or pleading has changed his mind and I have just been left heart broken and lost. It didn’t make sense to me, there has been a lot of stress since 2-3 months, and we have fought but I really thought everything was okay, I knew that since March he was more irritable and angry and I noticed that change, but the day I left was because he wanted another night to himself to be alone and I was pretty upset that this was the 3rd time since May that he needed a night to himself when I just wanted to be there(we were living together) but the night up until that point he was still loving and caring, he would wake up for work and stay in bed and hold me for a extra 5 minutes and then that Thursday after I agreed to leave and got a little upset and said ‘no I’ll leave’ he questioned why do I always leave when he is like that, and the night before(Wednesday) I was saying I would move out if the roommates had a problem with my dog because I didn’t want it to be any trouble and he was so upset saying I’m not leaving without him and how I’m trying to leave him so I was insanely confused that we ended up breaking up that Friday because he felt like he needed to be alone. I have done everything I can to try to convince him but I admit I have gotten very upset along the way and I definitely didn’t support him very much up until this point with being depressed because I didn’t truly realize he was going through a hard time because he kept stuff inside. He has been firm on his decision, I moved out and he doesn’t really seem to care besides the fact the first couple days he picked me up and was crying so much, he’s told me he’s pushing away the person he loves and can’t stop it, so why is he so heartless all of a sudden and just don’t care? Two years is hard to forget, his affection never did change besides we didn’t have sex as much because he was working 15 hour days. I feel like he is my soul mate and I have never been felt like this, and I’m willing to wait but I’m afraid I’ll be setting myself up for hurt. I really don’t want to be with anyone else, it’s just everything is about him, our love outside the fights felt like a fairytale and I just don’t understand much besides him going through a depressive episode and the amount of stress he had. Do you really believe that if you are truly meant to be that they will come back? I feel deep down he will come around but he doesn’t seem to care right now and that’s not him. I struggle with depression very bad so I know what it feels like to want to be alone, and not wanting to be around anyone but him, I know depression can make you do things the real you wouldn’t do. I just need some supportive advice, I have been focusing on myself more but I think of him every second of everyday, and I’m sorry if there’s any bad punctuation but I’m trying to get this off my chest.