@kkbonito,
said-
"What can I do to overcome my sad feelings about not being approached/feeling unattractive and that I will never have a partner who will love me?"
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Attractiveness is to do with 6 things- face, hair, body, clothes, shoes and personality, so I'm sure you and anybody else could score at least 4 if you tried, which is an above average grade ..
For example I once dated a woman who had a nice face and figure, but she wore oldfashioned dull clothes and horrible flat shoes and yukky close-cropped hair, and hardly spoke at all, so she scored only 2 out of 6 and I dumped her.