I got into a relationship with someone two years younger than me rushed it too fast with physical intimacy and then broke up with them because of my guilt while they were in a bad place mentally
How long did this relationship last?
I was going out with him 2 months. And I felt bad for what I did to him, he went crazy and got very depressed
Guilt can be a painful emotion to deal with. Have you tried to make amends with your ex and apologize for what you did?
Nah, I'm done with him. I will never talk to them again, I don't care about the consequences.
You obviously still care if you're thinking about it now. An apology might be all that person needs. They might be able to get some closure if they hear from you.