I feel the best I have felt in months

So I asked my fiance for some time apart because I truly have been struggling. We were fighting non stop, he was always accusing me of cheating, got mad anytime I went places without him, and he just made me feel very anxious and on edge. I wouldn't wear makeup, dress nice for work, have energy, and would always be told how depressed I look. Well, it has been almost 2 weeks and I feel the best I have in a long time...

He keeps asking when I'm coming back, but I just dont know if I am. He has been so so nice and is trying a lot, but I just dont know. A huge part of me thinks I need to just walk away.

Do you guys think he is the reason for my mental health going down hill? What should I do?