He told me that he’s not mentally there to continue the relationship?

Guy I been dating for 6 months told me he’s suffering from some mental health issues and he’s been seeing a therapist and he’s not mentally there to continue seeing and he needs to focus on himself for a bit and that it isn’t fair to me

I believe part of this is true but I’m not sure. opinions please?
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He told me that he’s not mentally there to continue the relationship?
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