No one here can tell you how he feels about you. We can't read his mind.

It would probably be best for you if he does not come back around, because you read into things. If he came back to the store to get something, would you think there was some significance in that, that he cares about you?

He may very well care about you, but he cannot be around you because of your behavior. Your behavior makes you an unsafe person for others because you do not observe their boundaries. There are many people who I care about and wish the best for, but for my own mental well being I do not go around them.

Ruby, what's hurting you is that you perceive there is some kind of special relationship when there is not one. When you say "how much it's hurting you", do you understand the inappropriateness of the whole situation? Your GM, who is merely an authority figure at your work, transferred, and it's deeply hurting you so much that you act out and have to be talked to by management. This is not normal.

When you go to NAMI, when thing you need to work on is building healthy levels of attachment and boundaries with different groups of people: coworkers, family, friends, acquaintances, etc.

I know it's very confusing, and I know you feel hurt. With time the hurt will fade. And in the meantime, follow the list of suggestions I gave you and the suggestions others gave you so you can remain professional at work.

Also, do you do anything outside of work to make friends? Do you have any hobbies that you could join a group of people who have that hobby and make some non-work friends?