I got selected because I was seen as a failure

I (25) live at home with my parents and grandmother (widow) and my siblings have both left home. I've a good job at an insurance office and don't get many dates. Our neighbors are old friends of the family and regularly partying together. A neighbor got Covid bad in 2021 and would pass away due to other problems as well as Covid early 2022. His wife 56 now lived alone rarely visited by her two children and their families. In late 2022 my sister got married and was soon pregnant, in August 2023 with the birth of their first grandchild imminent, my parents and grandmother went to visit my sister to be there at the birth. I stayed home and continued along as was usual for me, the widowed neighbor asked me to dinner on the Friday evening. I accepted as I had nothing else planned, after the dinner she asked me to stay the night with her. I was at first shocked, but also quite willing as well. She taught me to please her, and I became her willing sex toy every night from then. After my parents and grandmother returned sex became less regular but still at least once a week. She told me she chose me because she saw me as available, not having a girlfriend. Over the time since she and I have sex, every chance we get. I still haven't a girlfriend, but I'm regularly drained by the very willing neighbor.