I'm losing it.

I thought i had two of the best friends in the world. That'd we'd always be friends, even if we were far away. Now we're only 15 minutes away and don't even talk to each other. They've both explained why they're "mad" at me, and i've said sorry too! I don't know what else i'm supposed to do except give them my sincerest apologies. Apparently i need to show them i've changed? But unless i'm put in a position to change, how am i supposed to show them? Why can't they just forgive me for whatever i've done in the past and we can start over?

I thought I had two of the best friends in the world. But if they're not willing to forgive me over something that i'm HONESTLY SORRY about, then what good were they in the first place?
Maybe i should just give up on trying to get them back... i really don't want to... but do i have any other choice?