I lost my friends cause i dont use facebook?

[Well You Asked]

1) you can talk online and get to know people better without them judging you by looks they will know your personality first.
2) It doesnt matter if people remember you or not they are in the past and if you were important to them they will remember you.
3) facebook isnt about the quantity of friends you have but the quality a small group of close friends is better than a large group of fake friends
4) You dont need to take pics of yourself thats by choice you can even grab a cartoon picture off google to put as your profile picture.

It doesnt matter what your brother thinks.. as you said he is a d*ck. If you think facebook can help you reconnect with friends then why not give it a trial go? if it doesnt work out you can simply disable the account and if you like it carry on
Good Luck x