To various people, in no particular order:

• I'm sorry it seems like I'm running away from you
• I'm sorry I made things difficult
• I'm sorry you had to see me like that
• I'm sorry I ruined your night...several times
• I'm sorry for not intervening
• I'm sorry I haven't lived up to your expectations
• I'm sorry I'm not a better role-model
• I'm sorry that I don't want to see you
• I'm sorry I can't make up my mind
• I'm sorry I broke your heart
• I'm sorry that I'll probably break your heart
• I'm sorry I didn't tell you the whole truth
• I'm sorry for running off
• I'm sorry that I was mean to you when we were kids
• I'm sorry we drifted apart
• I'm sorry I make fun of your accent
• I'm sorry I never told you what happened to me, I didn't want you to worry
• I'm sorry I don't always appreciate you
• I'm sorry that I can't be with you
• I'm sorry I took him away
• I'm sorry I couldn't help you
• I'm sorry I broke that snow-globe
• I'm sorry I didn't tell anyone
• I'm sorry for that one night
• I'm sorry I didn't get to know you better
• I'm sorry I never told you about him
• I'm sorry that I can't stand to be around you
• I'm sorry that I don't see you as often as I should
• I'm sorry I didn't give you an answer
• I'm sorry I took some of your milk without asking first