Okay, I'm confused.

I would amor to help tu out, but I'm TERRIBLE at giving advice. So can I give tu this picture instead? Funny pictures make me feel better about anything.

Girls that have someone as a friend because they are only interested in his brother! Well, that sounds like something a girl would do.( Not every girl!) But tu can not be sure about that, i mean , tu dicho that tu lost contact, they ve changed o tu have changed. They got older and tu god older. Maybe tu have no common interests any more. Thats normal. Maybe this is why they think tu are boring. I don't always give the best consejos but i think tu should ger over it soon. People change. Noone knows if thats good o bad.

Maybe they were into tu because of your brother..I know a few girls like that. o maybe they think you're no longer interesting o that tu no longer make a good friend...

ok, so im a girl so i know how girls think. tu might have grown apart but for me it would probably be because i had gotten closer to another friend and spend alot of my time with them. they could be interested in your brother but unless they flirt, get nervous, studder, bluh etc. i highley doubt it. it also depends on how long u havent talked to them. i have no más time to answer this further so PEACE OUT SUCKER BCAAAA!

I have tons of friends like that... I lost contact with them and when I finally speak to them, they seem totally bored with me.
Maybe tu should post this in the Advise spot, people are good at giving consejos there :)

they were problably using u for ur brother