What should I do to make myself feel better about the situation?

Okay so last night my boyfriend was walking me home (we're both 16 so can't drive and do not have jobs) and he is 6ft 3 whereas I'm 5ft 2 so he is rather tall compared to me. Anyway he was holding his phone up really high so I couldn't reach and I was jumping to get it, I accidentally hit it out of his hand and it fell face down on the road. The whole screen is smashed, I kept saying sorry and that I felt bad but he was fine as it is broken anyway (it's an iPhone 5 and the home button didn't work) so it's not as if it was brand new. He didn't mind at all and he said that I shouldn't feel bad as he was going to get a new one soon anyway, he didn't get angry or upset but he was in his normal happy mood. I can't help thinking about it though and I feel super bad, he told me that he would get upset if I felt bad so I stopped saying sorry but I don't know what to do. Can anyone give me advice please x

When someone is getting a new phone they generally don't care what happens to the old one. Either that or he loves you and doesn't like seeing you upset.

If you know his favorite dessert, pie or cake, make one for him.
Or, take him out to dinner.
Or, send him some flowers with an apology note.
These also let him know you respect him, which is important for men.
Related: "For Couples Only" and "Finding a Higher Love" (no pun intended ;-)

You need to stop feeling bad about yourself.accidents happen. However You can console with a help of a defence mechanism like retrieting to yourself that may be he did some thing wrong that he was punished. May be he will buy a better and latest phone now