No, it is definately not true!
A lot of the minimum height requirements for jobs are being struck down as descriminatory. (see the link)
Navy Seal might be different though - even those in top physical shape can't get in. Have you checked what their height requirements are?
For everything else , the only thing that will get in your way is how YOU feel about yourself. Being short in a "tall" society isn't all that easy. I've always had to use a footstool to reach cupboards in my house, and supply shelves in my office. (no big deal) I've never viewed myself as short or limited in anything I do. I have a well paying job that I love, and I manage some musicians (rock & roll band) part time. Nothing holds me back - except me. I'm 5' - it never occurred to me that it had any kind of restriction or limitation.
You certainly can have a high paying job. There isn't a minimum height requirement for most trades, including brain surgery, and definately not for falling in love. You absolutely will get a girlfriend - the right girl will come along. But she will be attracted to you the "whole person" including a positive attitude.
To those of your friends who tell you otherwise - they are talking nonsense. Quit associating with people who say "you can't" instead of "you can". You don't need them in your life.
A positive sense of one's self is the most important key to anybody's success, short or tall, and everything inbetween.
Here are some famous people with some major disabilities:
Albert Einstein, Issac Newton, & Benjamin Franklin had Asperger's syndrome.
President Abraham Lincoln was bi-polar
Pete Townsend (of The Who), Thomas Edison and Ludwig Von Betthoven (the composer) were hearing impaired or deaf.
Helen Keller was deaf & blind
Vincent VanGogh (famous artist) & Alan Sheppard (first American in space) had Meniere's Disease.
Famous People with Multiple Sclerosis:
Annette Funicello and Richard Pryor
the list goes on. See the link here:
Then think of all of the famous people who were considered short in physical stature - here are just a few:
Yuri Gagarin (Soviet cosmonaut) 5'2"
Paul Simon (of Simon and Garfunkel) 5'2"
Josia Thugwane (winner of '96 Olympics marathon) 5'2"
Horatio Nelson (British naval hero) 5'5-1/2"
Spud Webb (basketball player who won 1986 NBA slam dunk competition) 5'7"
Clyde Barrow (of Bonnie & Clyde) 5'6-3/4"
Napoleon Bonaparte 5'6-1/2"
Henry Winkler (the "Fonz" on tv's Happy Days) 5'6-1/2"
Martin Scorsese 5'3" (producer, director)
Theoren Fleury (NHL, 2nd highest in points, Jan/2001) 5'6"
Voltaire (Francois Marie Arouet, French writer) 5'3"
Joan of Arc 4'11"
Roman Polanski 5'4"
Pablo Picasso 5'4"
Mickey Rooney 5'3
Truman Capote: 5' 3
Sammy Davis, Jr.: 5' 3
Bo Derek: 5' 3
Judy Garland: 5' 3
Dorothy Hamill: 5' 3
Deborah Harry: 5' 3
Davy Jones (Monkees): 5' 3
and many more - see the list here (some have web site links):