My views on Tony are slightly different. I see him as bi but I'm not convinced he knows it himself. I can imagine that he's always had feelings for men but pushed them aside. We know how much he wants his fathers approval and being gay probably wouldn't have help with that plus he likes women too. A lot. So it's not so hard to ignore anyway. He's probably decided it was all an adolescent phase and he chooses to ignore the gay porn on his hard drive.

I think his excessive womanizing (that sounds harsh, I don't mean it badly) is probably due to his confusion but I do think he truly was attracted to Jeanne and did come to love her. He was hesitant because he was worried about hurting her feelings and that's exactly why I think Tim would always have to make the first move (even if Tony has engineered it accidentally on purpose) because Tony would be too scared to risk their relationship on what might be a one time thing for him.