How should I come out as bi to my family?
Coming out as bi to your loved ones can be challenging and scary, but always remember that you deserve to be true to yourself, live authentically, and be happy. Here are some steps that you can take to help you in coming out:

1. Find a safe space. Choose time and place where you feel comfortable having this conversation with your family. This news deserves their full attention. 
2. Explain what bisexuality is. Many people may not fully understand with bisexuality means. Let them know what it means to you! Explain it in a way that is clear, direct, and easy to understand. Questions are OK, help educate them!
3. Be prepared for reactions. First reactions may be unpredictable. Your family may have a range of reactions, both positive and negative. It's important to be prepared for how they might react, whether it's positive or negative. If possible, try to get a feel for how they feel about bisexuality beforehand so you know what to expect. 
4. You don't have to tell everyone at the same time! If there's one family member you're more nervous about telling, start with the parent you feel safer talking to.
5. Be clear about who they can tell. Decide whether you are comfortable with them sharing the news with other people.
5. Seek support. Coming out can be emotionally draining, so it's always good to have friends, a therapist, or a support group that you can fall back on. Surround yourself with people who love you!

Always that remember that you don't owe it to anybody to come out. If you feel that your family may potentially hurt you in any manner if you come out, it may be best to abstain from doing so for the time being. Good luck!
if you are bi than try to fight 1 desire I mean you can get satisfaction anyway right?
Studies show a positive correlation between coming out and happieness and health. Trying to live an authentic and honest live should be considered as an option.

One the other hand trying to hide how one feels can be a useful strategy in some contexts.
And it might be easier for bi people than gay or lesbian people.

Only 19% of those who identify as bisexual say all or most of the important people in their lives are aware of their sexual orientation. In contrast, 75% of gay and lesbian adults say the same.
https://www.pewresearch.org/fact-tank/2019/06/18/bisexual-adults-are-far-less-likely-than-gay-men-and-lesbians-to-be-out-to-the-people-in-their-lives/

Your course of action should depend on your personal situation.