My boyfriend of 2 years has come out to me as bi sexual and I'm having a hard time coming to terms with it.

I love him more than life itself and I know he's the man I will marry. He came out as bi sexual about 7 months ago and I'm trying very hard to be accepting and open minded but I feel like I haven't made any progress. I only one answers from people who have actually been through this. What ways did y'all go about thinking about it to help you be more accepting. I've already let some hurtful words slip and I don't want to hurt him any more. DO NOT SUGGEST A THREESOME.