how would you feel if you found out your partner was bisexual?

If your partner told you they were bisexual, how would you feel? Would it change your relationship, or even break you up? Or would the fact that they told you such a personal and honest thing make you love them even more? I think i might be bisexual but have never told anyone. I love my boyfriend to bits and dont ever want to lose him. I feel that i must tell somebody how i am feeling though. I have no desire to persue this new side to my sexuality as i believe in monogamy and really love my boyfriend. Sensible answers only please

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