Don't worry about your height mate. All the men in my family are short, and I'm no exception (5'3"). And there's loads of short guys out there, no less manly than the tall ones.
As Mr Hyde said above, dressing in a certain way can make you appear taller - I tend to go for darker, straight leg jeans with a black v-neck, slim jumper, and a t-shirt. If I wear baggy jeans I just look like a square!
Have you ever tried Alexander Technique? It helps improve your posture and can actually make you appear a few inches taller! I used to have it when I had muscle problems as a music student, and it worked wonders.