I understand ur feelings, and i don't want u to feel pressure or feel like you have to walk on eggshells around me just to avoid hurting my feelings.

i agree with what u said before.

i admit it's my problems, you didn't do anything wrong.

Technically "problems" could work, but unless referring to a specific enumerated list of problems, "it's my problem" sounds more natural. Meaning generally it's my fault, I have a negative reaction to [whatever the issue is.]

i tend to catastrophize and assume the worst in people so that when it actually happens i won't feel much(very | too) disappointed or hurt.

most of time it protects me, but sometimes it end up hurting myselfe instead.

I hurt myself.
It hurts me.

I can't promise you small conflicts like last night won't happen again, but i can promise when thea similar situation happens again, i will try to be more patient waiting for u, have more trust in u, and let u know when i need to leave to deal with my emotions alone.

I understand your feelings, and iI don't want uyou to feel pressure(d) or feel like you have to walk on eggshells around me just to avoid hurting my feelings.

iI agree with what you said (before).

iI admit it' was my problemsfault, you didn't do anything wrong.

iI tend to catastrophize and assume the worst in people so that when ita bad thing actually happens i wI dont't feel much disappointedment or hurt.

mMost of the time it protects me, but sometimes it ends up hurting myself instead.

"I end up hurting myself" works too.

I can't promise you small conflicts like the one last night won't happen again, but iI can promise when thea similar situation happens again, iI will try to be more patient waiting for you, have more trust in you, and let you know when iI need to leave to deal with my emotions alone.

A bit long, but works fine.

I can't promise iyou I can change, but will u stay by my side whileif i try?

While I try works too, but seems a bit smoother this way.