Should I give up on love/life altogether?

After all, I am alone and lonely and nobody seems to see anything positive in me. I do a lot of things, meet a lot of peope but that is all very superficial and when I come home, it is as if the loneliness weighs double.

I've had a relationship when I was 25 until I was 28. Then I have been single for 8 years. After that a toxic relationship that lasted from 36 until 46 and a year after that a relationship that lasted allmost a year. That is my entire history. I have been single and lonely for most of my adult life. I obviously lack the appeal to have somebody fall for me, the social skills (not the mention the sexual expertise) to enter in a relationship and keep it going. But with an average life expectancy of still another 35 years ... it seems hard to have to live this nightmare for so long.