Okay so for the past, I'm going to say 3 years, I have suffered from PE. I am 17 years old and fear I have brought on my PE by masturbation because I used to be just fine. Anyways, this problem has gone on all this time and I've never mentioned it to a single soul. Let me also note that throughout my childhood I went to many different psychologists and therapists and have also been on a number of anti-depressants (though not for some time now) due to my depression/social anxiety. No doctor has ever been able to help my depression. PE is only making things worse. Recently I have gotten worse, and I've also started noticing more problems developing. For the past few months I have been urinating way more than usual, and I almost always feel the urge to urinate. I often have a hard time forcing urine out and after urination I always leak a few drops of urine into my underwear. When aroused, I will leak a small amount of semen quite quickly. I don't think the cause of my PE is psychological because I'm not uncomfortable with my girlfriend, and though we don't have sex, we still have an active sexual relationship. The problem is that whenever I'm aroused, anything making contact with my penis will cause my PC muscle to flex, uncontrollably, and this stimulates me to ejaculate far before I should.

One last thing I'd like to add is the possibility that my PE and depression/social anxiety could both be the symptoms of a larger problem. I have considered my poor diet and lack of exercise as a possible cause. Don't get me wrong, I'm not overweight, but I could in fact be malnourished because my whole life I have been a picky eater and hardly ever eat any vegetables at all. Recently I have been eating vegetables, as well as eating fruits and drinking lots of water and NO soft drinks.

I hope I have addressed everything I need to, and I hope someone can give me some good advice. I need to get help soon because all I want is to have a normal sexual relationship with my girlfriend so that we can experience love as it should be experienced and I can make her as happy to make love with me as she is just to be with me.

edit: One more thing to note is that I've had significantly softer erections since about the same time my problems with PE first started. Could this be the cause?
Maybe I just need to get a little blood flowing like it used to.