What does someone mean when they say those (in the description) to someone?

[Anonymous]

What do you think, what does someone mean by these words!!!

"What's so great about you is that you always think you are right, and what's so frustrating about you is that you are almost always right. You are brilliant, funny, surprising, and caring but with you, I was always lonely, and with him, there's always room for me."

[Guy13]

Basically,” you are everything anyone could ever want but you are wholly self-absorbed It’s too bad but is what it is….”