Yes, it's called biphobia. It's similar to homophobia, but focuses on bisexuality.
Also, in general, if something exists, there's probably a phobia of it. What you're more likely to see, though, is bi-ignorance -- straight people who "just don't get it" and gay people who say things like, "You're just gay and afraid to admit it."
Yes, the phobia of being laughed at does exist.This phobia is called gelotophobia.
Social Phobia is the phobia of embarrassment. It is the phobia in which a person is scared of being bullied.
Social phobia includes the fear or phobia of having no friends. Individuals with social phobia have a strong fear of being judged by others and of being embarrassed.
Hypnophobia is the name of the phobia relating to the fear of being hypnotized or in a sleep
Indeed the fear of relationships is a recognised phobia.The phobia of being in a relationship is called Philophobia.
Social phobia or social anxiety disorder
There does not appear to be a phobia term for the fear of being confused. However, phobophobia is the fear of being afraid.
Socianthphobia
Efkatalipsiphobia
Agrophobia
Autophobia
The type of phobia for being spit on is called hydrophobia. Is means to be fearful of liquids, dampness, or moisture