Every bisexual would struggle a lot before coming out. Along with the huge stress, guilt is another feeling what some bisexuals would have. People like to discuss their feelings and experience in the bi chat rooms and forums. But you should never feel guilty about being yourself. Your family and your friends might not accept it because the society does not accept bisexuality, but you haven't done anything wrong.
Most of us have been raised with the value that same sex intimacy is wrong, dirty, shameful and even sinful. Homophobia and biphobia make the situation even worse. All of these things run very deep inside of us. And when you found yourself bisexual, you would feel guilty.
For those unlucky ones, they feel guilty because they don’t get any support after they come out to their family members or friends. You can find those poor ones on many bisexual dating apps or sites. Here is a typical example.
Josh, bi man
I came out to my family earlier this year. And I got things like "we love you, but you aren't welcome in our home if you 'choose' that lifestyle". I felt massively guilty for most my life for being me and also not being me.
It seems that the safest place for bisexual people to come out is bi dating sites or bisexual hookup apps. Only bisexuals would understand what bisexual suffer from the reality. One way to reduce or remove your feeling for guilty is chatting with other experienced bisexuals in the bi chat rooms.
There is another situation. For real though, almost every bisexual in a hetero-normative relationship feels this way. And for those who haven’t come out to their partners about their bisexuality. You may also feel guilty for keeping them hidden from knowing the real you. Your love and your affection are true. There is nothing that you should feel guilty about. And you aren't "passing" as straight, you're just happy with a man at that time. It's your life. You decide it.