Blessing in disguise? Huh?

1-What do you say if you found it's funny when you are in a middle of argument? Especially with your 'special' one?

2-Honestly, it's feel sweet and in the meantime weird. What does that mean? I mean you got in a fight with someone and you find it hilarious? Not sure if I put all this in a right word.

3-Or that is my problem?