
By the sound of this yes you are "psyching yourself out".
Putting on a condum can be a mind strain as it is.
Also, depending on how often you have sex can create some issues with staying hard.
Even if your not thinking at the time of your daliy stress issues like your bills, job or what ever can still effect your sex life.
Of course drinking, smoking or drugs {illigal or not} can be a factor, even if your not a heavy drinker or smoker.
So how might you go about to fix it? (I'm not a doctor)
1- Don't drink before sex (you might think it helps to get in the mood but for men it really does'nt)
2- If you smoke then stop (you'll see changes in a matter of days)
3- If you have sex 4-6 times a week then try to have sex just 1-2 times a week. (Take long walks for all that free time you two will have.)
Like I said I'm not a doc, but if this can help in some small way then it was worth it.
Chow-