Am I being too clingy?

Not at all. The reason you probably want him to yourself is because he's like a father figure to you. It seems like a lot of stuff has happened to you and you just want someone there for you. I completely understand, and I'm sorry for the loss of your father. But I have a question, did you talk to your father like you do your uncle, and were you guys really close? And you do have to give him a bit of space to do his own thing.