"But - the site goes on to say, that it's possible through God to just stand up and walk away from homosexuality."
Homosexual behaviour... sure. Homeosexual feelings... unlikely.

" It's so confusing, like, I was in tears, scared almost, it's not that I don't believe God can do it, it's just... really? I thought I was stuck with this, I still think I am, I thought it was just something I would struggle with the rest of my life, but I just don't know really."
From what I've read... NOT really! This will be something you'll be "stuck" with for the rest of your life. That seems to be the experience of most people. God can indeed change you but it seems He don't generally work like that.... and why would He need to... He loves you just the way you are and your sexual orientation does not stand in the way of any plan of His for you... in fact He will use it to His glory (so I believe).
You know I'm a conservative... I'm not going to endorse homosexual practice of sex... but love and friendship and companionship... go for it.
I also believe that being gay shouldn't necessarily prevent you from having a wife and a successful marriage.... as difficult as your sexuality will make that.

"I also read that I need 'prayer' warriors, so if there are any of you out there, I need you."
Little brother, I've been praying for you for years.

Blessings
Cat.