It could be your approach, your attitude, your demeanor when you're speaking to him, your views that clash with his, etc. OR it could be your blind love that is making you stick with a guy that sounds like he doesnt deserve you.
If he has a problem with all of these, your approach, your attitude, your demeanour, when you're speaking with him, or even when not speaking to him, then he should not marry you and you should not marry him. You can try and bend, twist and mold your personality into a version he sees acceptable. You know what? He still won't accept you. You will still be mistreated and emotionally/mentally abused. Trust me.
For the girls who ran far away when their partners faked suicide, good for you. You girls are brave.
Faking suicide is emotional terrorism at its finest. It's also a HUGE RED WARNING SIGN. Stay away from these kinds of men. Believe me, you will regret it if you don't.