TW attempted suicide, emotional abuse and depression

First of all, beyond judgement, I'd like to know if you know of a way I could have handled it better.

I had a boyfriend for about a year, we were students living together and he was emotionally manipulative. He constantly tried to isolate me from my other friends by making a scene when I was about to leave the house to meet them or being passive aggressive for days right after.

Fortunately I had had enough experience with abusive partners and I knew it was manipulation so I (almost) never gave in. Unfortunately due to my mother's pressure to get married and the fact that she liked this boyfriend of mine, I just lived under the illusion I could change him and we would live merrily ever after.

After so much enduring I decided it was enough. I was risking losing some friendships that were very important to me due to how much time I was spending taking care of him (cooking, cleaning, etc) and I decided to leave him.

Part of the reason why I had to take care of him so much is he struggled with depression and he sometimes told me if I left him he would stop eating and let himself die. Which I know is a tactic to manipulate me but it is true that when I didn't cook he would just not eat.

When I was about to leave him he still had a month to finish his studies and was preparing a very important exam. Because of that I decided to postpone leaving him and did my best to support him (even wrote part of his thesis for him). It looks like he really needed this support (his family disowned him and his only friend lives in his country of origin).

Unfortunately due to the fact that I already knew it was over, I started developing feelings for someone else and I ended up cheating just a few weeks before leaving him. When I left him, I didn't mention cheating, but he was hospitalised a week after allegedly for having attempted suicide. I'm at least glad he's alive and I managed to help him get a decent grade so he might find a job in the future and pick himself up.

Would you have handled it differently?

If I had left during exam period life would have been so much more difficult for him after a bad grade or worse again having to repeat the year... and about the cheatind, the fact that the deed happened holds almost no relevance to me since I was already emotionally moving on.