Why is he keeping me in relationship limbo?

My boyfriend has been under a lot of stress recently so he feels he needs to relax from a relationship right now and focus on other problems and to "do his own thing". He does still contact me almost every day but tells me he feels uncomfortable when we hang out and that he doesn't think things will ever be the same. I am not sure why I am being strung along. What is the deal?
Why is he keeping me in relationship limbo?
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