YMMV, but when I find myself feeling this way I try to force myself to do what is incredibly uncomfortable, but ultimately probably best for me: I tell them tha

YMMV, but when I find myself feeling this way I try to force myself to do what is incredibly uncomfortable, but ultimately probably best for me: I tell them that I miss them and want to schedule some time together. That could mean a weekend to see them, or scheduling a video chat to just catch up, or just a short call while you go on a walk. It can seem awkward or stilted, but eh, I'll take that feeling over the loneliness any day of the week.