I am an extremely picky eater. If I make myself eat foods I hate, will I start to like them eventually? Any other ideas?

I am so picky it is becoming a problem in my life. Simple activities like eating out with friends or going to my fiance’s family’s for dinner is difficult because of my pickiness. It’s starting to get embarrassing for me, but I can’t help the fact that I don’t like most foods. I want to change and like a wider variety of foods so everything I do isn’t so difficult.