Am I having a problem with Erectile Dysfunction and ?

I am a 38 year old male who recently moved in with the woman of my dreams, we have great on a nightly basis, we both are going through divorces and there are some stresses happening with our respective spouses. We have awesome and I am very attracted to my girlfriend. The problem is that after about 30 minutes or so of I start to lose my . In order for me to have an , I have to be stimulated, I can't *** on my own, so I have to have my testicles maged, or my stimulated to achieve an . I don't drink or do drugs, I exercise daily, and all that, but I still am having this problem, it does not happen everytime, but it happens probably 25% of the time that we have . Can anyone offer some real advice as to what I can do?