Struggling to Keep Friends

I’ve recently been having trouble keeping friends, i usually just accept that they don’t want to be my friend and that’s it. But? there’s this one person who i feel has only seen the bad sides of me, or when i’m at my not so proudest moments. I want to be able to show them that what they have seen isn’t really who i am as a whole but i feel like they’ve closed their mind off to me. I don’t know what makes this person so different from others but my head won’t let me give up until they at least forgive me for my sudden outbursts, rude and childish behavior. I dont know if i should actively try to ask them for forgiveness or just try to get over it. I’ve given them many reasons not to like me in such a short period of time that i really don’t know what to do. Any advice?