This is very similar to my situation. When I was 18 (now 25) I had a depression and anxiety disorder combined. After two years of therapy I decided to use medication, because talking never helped.
I'm now on Prozac for 4 years and I'm still amazed by its effect. No side-effects and my symptoms never returned. Don't worry about getting addicted to anti-depressants (serotonin reuptake inhibitors) because they don't work like drugs. They balance the interactions between proteins that make you feel happy and this takes several months to have effect, while drugs like oxazepam directly stimulate certain receptors. So it's not like you feel better by taking more Prozac, it will make you feel worse.
One imporant thing to add, if you do decide to use medications, use them to work on yourself as they will give you the courage to do things you wouldn't before because of your anxiety. It is not my plan to stick with Prozac forever. I want to quit when I'm sure my mentality has improved.