Rate a low elo player who's trying to improve

http://www.leaguereplays.com/replays/match/91508/

I felt i played all right. i'm at 1240 elo, have been working on improving, and was looking for advice. i know i'm far from the best player around, and that's why i'd like your support on improving my game.

What did i do wrong?

What did i do right?

Could i have built better against their team, still being the AD Carry?

Were there decisions i was making on a team level that i could've done better?

Please, tell me!