Caught between two worlds
There is a lot you can do to make the best of your situation. I can tell you what's been helpful for me. 

Social interaction regarding worldly things can seem like a ridiculous waste of time; but social interaction regarding the Buddha's teachings can be energizing. Reducing your old ways of social interaction and time spent on entertainment can give you time to find others, both online and locally, who share your interest in the Buddha's teachings. 

A job can seem very dreary when the old ambitions you had no longer motivate you. But you can keep in mind that your job gives you the opportunity to give dana and support the Dhamma and that is really an honor, I think. Learning to live frugally so that you can give dana can be rewarding.

You can set a quiet, good example for everyone in your world by keeping the five precepts, following the noble 8 fold path, and letting it drop in casual conversation that you are Buddhist or that you meditate. You don't ever have to try to convince anyone about your beliefs. Just let your actions and demeanor speak for itself. Seeing positive changes in you may create interest in Buddhism or meditation in those around you. 

You can join in a sort of spiritual solidarity with monastics by keeping the 8 precepts as often as possible. That's good for focusing on your practice too.

When monastics depend on laypeople for support and laypeople depend on monastics for spiritual support and teachings, a wonderful synergy is created. And both sides of the coin are important. I recommend a book called The Buddha's Teachings on Prosperity at Home, at Work, and in the World. http://www.amazon.com/The-Buddhas-Teachings-Prosperity-World/dp/0861715470# It has many teachings directed at laypeople that you don't often hear and can help you understand the important of laypeople in Buddhism. 

Best wishes in your journey.