She suggests leading with the following: “Hey, I'm not sure if you knew, but I really liked [name of person].
I'm happy that you two seem to have found happiness together, but please understand it may take some time for me to feel comfortable with it.”5.
Give yourself permission to walk away from the situation for a little while.
“Remember that if you truly care for your friend, their friendship is valuable, even as romantic relationships come and go,” she says.
“It's okay to stay away from or leave any situation in which you feel uncomfortable,” Hasha says.
“It may simply take some time to get used to the idea of your friend and love interest being together, and that's perfectly normal.” She also advises that you communicate this to your friend as well, and explain that you might just need some time and space.
Try talking it out with your friend, especially if they knew you liked the person.
If you had spent a lot of time chatting with your BFF about your crush, it can feel extra confusing if something starts brewing between them.
According to Hasha, any type of communication is better than none at all.