Does not coming out as bisexual mean that I'm ashamed of it even though I don't think I feel that way?

No! It just means that you are not comfortable in the environment you live in to let people know about a personal part of you.

Everyone processes things differently. I do not think it means you are ashamed but afraid of what others will think. Fortunately, today the LGBT community has so many resources available to them

Not necessarily. Everyone coming out journey is specific to them. Maybe circumstances are not right in their environment and they cannot safely come out, or maybe they just decided that it's not time.

Definitely not! You can be happy with who you are without feeling the need to share it with other people, just be who you want to be and tell people what you want them to know! You don't have to tell someone if your straight so why tell them if your not, it's entirely up to you who you want to tell and why :)

Not necessarily. It could be because you are afraid of the reactions people may have. There are a lot of homophobes in the world, and knowing that prevents so è people from coming out. You can completely embrace it and not tell anybody. When you do decide to come out, I'd recommend bringing the topic up to your friends/family, and making sure they're okay with it, then telling them. I told my my friends first.

No, that is not true at all. You don't have to come out to anyone you are not comfortable coming out to. If you are unsure of your sexual orientation, you could think about it more. Even if you are bisexual, you do not need to come out as bisexual if you are not comfortable doing that.