My girlfriend and I decided to start scuba diving a few weeks ago at a local PADI certified dive shop. Up to this point I have never even snorkled before. I went to my first session and did the first two hours of in class and thought that this would be a new and unique experience that I would enjoy. As soon as I got into the pool with all my gear on I found that I am quite clausterphobic underwater and cannot stay down for very much time at all. I just feel like I have to come up for some real air. Another problem I have encountered is that I am constantly breathing out of nose which in turn is filling my mask with water and is very uncomfortable. My instructor has been very pushy and is not taking any extra time with me. This has strongly turned me off from wanting to continue. My second in pool class was last night and I did not go. My girlfriend loves it and is continuing to attend even under great protest that I should be sucking it up and going with her anyway. Partially I know she is right and I should give it another chance, but the bad attitude im getting from my instructor is not helping any. He has told my girlfriend that I can come back next week and catch up, but im not sure if I can mentally talk myself into it.