If you don't want to marry someone you've been dating for 7 years at that point it sounds like you actually just don't want to be married. Which is fine. But you need to let her know that.
From her perspective marriage brings stability and permanency. A lot of women are pressured that their 20s are the only time that decent men will want them. She's expressed how she feels and you can react how you feel is necessary.
You…YOU are the third wheel.
You are looking at and infringing upon their relationship.
Move on to better things for yourself.
If you don't want to marry someone you've been dating for 7 years at that point it sounds like you actually just don't want to be married. Which is fine. But you need to let her know that.
From her perspective marriage brings stability and permanency. A lot of women are pressured that their 20s are the only time that decent men will want them. She's expressed how she feels and you can react how you feel is necessary.
Now he will be your first breakup!