I'm in love with one guy but I'm going to marry another one.
Why are you in love with one, but marrying another?
I know the guy I love doesn't have feelings for me but I want him because he's a great guy.
If you love a guy you should pursue your love instead of getting married to someone. It'll hurt everyone in this.
What I have with my fiancee is great. I have no reason to leave him.
It's not fair to your fiance to get married if you're in love with someone else. Even if you have no chance with the guy you love more, it's not okay to take advantage of the guy who loves you.