Seeing people in a relationship around me makes me depressed

Im 30M, sometimes I just want to give up and be happy alone with the mindset of if it happens, it happens. But then I will go out, and see couples enjoying themselves, and I know the guy is not better than me, and it just makes me feel stressed out. I don't know what to do, I got 2 dates on tinder in 1 year. They didn't go anywhere. I can make more efforts, and everyday I try to improve myself, but still like I know I am already good enough. I already have a good life where I am happy. I am kind and generous (I know one should not say it, but this is for the purpose of this post). I have good friends. People tell me Im good looking. I may be on the shy/introvert side but so what, I see many guys who are even more shy than me with girlfriends...

I feel like I got a spell on me to not get a girlfriend.