Herm.
I've never had bisexual inclinations, personally. But I ain't gonna hate on anyone who does. If it wasn't something to struggle with, then it wouldn't be a problem to begin with.
But at the same time, I can't say that those who are engaging in homosexual activities are in the right, either. Though, it's not my place to judge another man's servant (God's servant in this place.) It is my duty to try to help out when a brother/sister in Christ is doing wrong! (Well, at least from my understanding.)
I'd like to do so in a loving manor, though. So, please don't take what I have to say offensively.
I recollect the story of Sodom and Gomorrah. Where God smote the whole city because they were such a sexually perverted people. I'm sure most of ya'll remember when that lot of guys who wanted to have relations with those angels were smitten with blindness. This would indicate to me that God considers sex something sacred to take place between one man and woman.
God said he never changes. And, when Jesus came along, it wasn't God who changed. It was his policies. Jesus fulfilled all of the Leviticus laws so we wouldn't have to, but he didn't change what was right and wrong in the eyes of God. He gave us an infinite, get out of jail free card to get away from sin. Not a licence to do so without any penalties.
Assuming these two statements are correct, this means that it's alright if you HAVE sinned. But, not alright if you KEEP sinning. And, it is a sin in God's eyes to have sexual relations with those of the same sex. So if you have engaged in bisexual activities before, that's totally fine so long as you repent of it and come back to God. But it's not okay to continue being bisexual while trying to still serve God.
Our heavenly father said that you cannot serve two masters. And, if you're having sex with someone of the same gender, who are you doing it for? Certainly not for God... You'd be serving your own desires. And, in my experience, serving your own desires only leads to bad things.
So, with that said, there's one more thing I'd like to convey.
You can love whoever you wish without having sex with them. I love my sisters, father, mother, and a few relatives dearly. But, I'd never want to have sex with any of them. I've known people who loved their best friends more than they did their boyfriend/spouse without wanting to have sex with them.
In this way methinks it's acceptable to love everyone regardless of gender, though those of the same gender are not to be loved in the same intimate way you would your husband/wife of the opposite gender.
Well, that's it. You don't have to take it for granted, by do at least try to consider it. I ain't hatin' on you for what you struggle with. Part of love is understanding after all.