maybe ...
http://www.mangago.me/read-manga/kaibutsu_san_ni_rei/
she fixes his hair and then later due to his strength he tries to avoid her...
you might like since they are similar to your description but not quite:
http://www.mangago.me/read-manga/saikyou_venus/
http://www.mangago.me/read-manga/gyu_tte_shite_ii/
http://www.mangago.me/read-manga/tamachen/
its not that one sadly ; A ; the one i read had a lot of chapters in it ;;
but thank you for the suggestions as well!
oh, okay sorry ><
it takes place in a school. the protag is a girl her hair is long, i think she might be blonde or brunette idfk.
but the story is there is a guy who is 'scary' and people avoid him until she starts talking to him and gives him a haircut i think?
i think in the final chapter they go to a camp and they confess their love to each other after the girl thinks he doesnt want to be around her or gets jealous about another girl hanging out with him.