When you speak of him having time alone, i imagine that you are speaking of him being alone in his room with the door shut. About what percentage of your time together is he doing that?

Do you two sleep in the same room?

It sounds like you blame yourself for being clingy, and in fact your main focus seems to be on how you need to change. I myself think it would be very hurtful if a partner is routinely behind closed doors.

There is an alternative to blaming yourself for having natural human needs; there is an alternative to hurting and learning to cope with those painful, unmet needs. That alternative is to try to find someone who is willing and able to meet those needs.

Breezy-Day, you are human and it is okay to have human needs for connection and affection and just plain help atound the house. It is okay to hurt if those needs are not met. It is okay to feel hurt that your partner shuts you out. It is okay to ask for change. And it would be okay to leave if you cannot get your needs met by your current partner.

(((((Breezy-Day)))))