How can I tell my Dad I'm Bi?

You can express your feelings as openly as you can, tell him what it means to be who you are, how you realized you are bi, and reassure him that nothing changes in who you are as a person, you're still you though this part of your identity is different than he thought. Make sure he knows you want to share it with them because he's important to you, and maybe tell him that you believe in your relationship and you're sure he knows that nothing changes in the person you are. You can also encourage him to ask you any questions he may have about it. Be patient, it's possible that he'll need more time to come to terms with it, but what truly matters is that he gives you a chance to be listened and understood: that's a signal that he's willing to give you a chance. Ultimately, those who really love and care for you will accept you for who you are and they'll just want you to be happy, no prejudice can ruin real love! If you're feeling very uncomfortable, you can even consider writing a coming out letter.

There are multiple ways to come out to people, although there are some important things you should consider before coming out. 1. Safety. If coming out could put you in any sort of harm, then while it may be hard, it’s better to stay closeted. A good way to see if you’re safe is to test the waters by making up a bi friend and bringing it up in a conversation. (“My friend told me she/he was bi today.”). This will help you gauge his reaction. If it goes poorly, then stay closeted. Your safety is the highest priority. 2. Readiness. If you don’t feel ready to come out, then you don’t have to. Wait until you’re comfortable with your identity and yourself before coming out. It’s important that you come out ONLY if it’s safe and you feel ready. If it’s safe and you’re ready, then there’s multiple ways to come out as bi. Coming out is something that each individual can do differently and personalize it to play to their strengths. People who like baking may bake a cake or cupcakes with the bi flag. People who like writing might write a story or a letter. People who like talking openly might bring it up and just say it. People who like drawing may draw a picture with the bi flag and themselves. People have also bought things with their flag on them to hint to their parents. There are so many ways to come out, and I suggest doing a search for some ways within a category you like. I hope it goes well for you and that he accept you, but you are valid no matter what!