If I cant find a girlfriend, why do random people want me around then?

Its been 15 years since high school and I've only ever had one girlfriend in high school. since then nothing. Tinder, bumble, all of them. None of them have ever worked for me. I dont know if it's because I'm ugly or if I have a personality people secretly dislike. But there dont seem to be any single girls in my area... who also happen to want to date... and those who do dont seem to want to date me in particular. But are fine with being friends. I dont see any point in life. I'm just going to work, have a bunch of money I dont spend anything on sit in a bank account then die. I used to have hobbies but after realizing everyone else is enjoying the same thing... WITH someone else it made me realize how utterly unwanted I am. So what is the point of life? I see none. I may not have the best job on the planet (I'm just a security guard) but I see unemployed men able to find girlfriends. I'd do anything to have that. I'd sell my house, my car, everything, no not sell it. I'd give it all away. But nothing I will or can do will matter or help. I've tried malls, libraries, churches, etc. Nothing. Nothing has helped. I felt like I've been close, but not close enough I guess. All this that I've been doing over the years is just so pointless if I'm going to do it alone. Too bad I'm not gay, I'd have no problem finding someone since I get hit on by gay guys more than I do women which has been never.  I'm tired of it all and am just getting ready to be done with it.