I am 35 years old now. have a 2 years old son. i got married 7 years before. had very bad first 2 years of marriage. since then mostly all has been good between me and my wife.

But i can only remember bad things about my marriage. even for general life i only remember bad stuff which happened to me. i dont remember single good thing happened to me.
i dont remember anything good. my wife always take care of me and loves. she always tries to make me happy.
i am full of negativity. even for my friends i only think negative. i feel jealous also. i was never like this.
i was never like this before. i dont like to socialize because i feel people are there to just use me.

i never ask for help until really needed.

i need to change. i feel shit about myself. please suggest what can i do