I'm in my 20s and have never been in a relationship.
I have this really strong sense of shame/embarrassment with romantic relationships. I can't believe I have never realised it until now. I have never been able to tell anyone who I like, even when I was a teenager when my friends would be discussing the latest boyband I could never admit which band member I liked and would get really embarrassed. I cannot watch anything that has even the vaguest inclination of romance with my parents. I even get embarrassed when watching Disney Princess films with my niece if another adult is watching it with us as I find it embarrassing for some reason. If there is a good looking actor on any film or TV show I have to leave the room or go on my phone so it doesn't look like I am looking at the actor. Whenever boys liked me at school I would feel so anxious it would make me feel unwell, I wouldn't be able to eat or sleep.
I think it comes down to two things. One is when I was around 6 I received a Valentine's Day card and my parents teased me so much about it I cried as I was so embarrassed. They then used that card as leverage in punishments "be good or I will show your grandparents your Valentine's Day card". Also my parents have a pretty awful marriage, they openly dislike each other but will never get divorced.
When I am alone I have none of these problems. I can watch all the romcoms I like and I can freely admit to myself when I like someone so I don't think it's like repression but instead just embarrassment when with other people. I am 100% straight too so it's not issues with my sexuality. At the present, I don't feel like I am missing anything as you can't miss what you have never experienced and what you don't think about... However deep down, I would like to get married one day and have children. That "one day" is coming up fast and I will need to meet someone soon if I want that but I just feel too embarrassed.
Has anyone else experienced anything similar?