How to say to a guy"I love you?"while he hates you because you did something wrong that he hated?

He only knew me for a week.And I knew him for 3 months.(Big difference)and I was inlove with him since than.We talked on fb cause he found out I did something wrong without asking him.the fight got huge for one week so he blocked me.:( so his friends contacted me on fb and I told her about the fight and she's bringing me to the library with her friends and him.And he doesn't know it's me who's coming.So she said that she's going to bring him to the corner and another friend will bring me.we both have to apologize to eachother and be in good terms.But I also wanna say I love you.how do I do it?