There's always a person in my life who I'm constantly seeking validation from. This has been a pattern throughout my life. When they give me validation, it feels like a high, addicting. When they don't give me the attention I need, I fall into a deep depression. 

It could be as simple as them not laughing at my joke or as big as them blatantly rejecting me. This person has rotated from friends to bosses to romantic interests.

I don't know how to shake this. Right now, it's someone who I work with / friend . The last time we worked on a project together, I felt rejected by this person and everyone else there. Like I was leftovers or like I wasn't wanted or needed.

Recently, I went by work to say hi. The truth is, I went desperately wanting attention from this person, which they did give me. But as soon as they stopped engaging with me and with someone else, I would get so low and in my head. Then I'd get emotional and triggered to that last time I felt rejected by them. I was on the verge of crying.

I know this isn't healthy. I don't want to remove this person from my life, but I don't know how to have a relationship with this person without getting triggered all the time.