I'll give you some advice that I wish someone had given me a long time ago! My ex also suffered from depression and he always told me that just having me there (in person or through text) was a big help to him. I often offered my support (a hug, a movie, etc), but found that he often wanted space. He would push me away and even said some hurtful things at his worst. I tried to make him happy, although it took me a long time to realize it wasn't personal and that he had to want to get better. I'll tell you that taking care of yourself and your own interests at this time is crucial! This is something I didn't do and now regret because I totally burnt out. Just tell him you're there when he needs you and having an open conversation about what he wants/expects from you will definitely help!