hiii dear nervousness and anxiety can cause erectile dysfunction hormonal imbalance also cause this low testosterone can cause decrease in libido and further erectile dysfunction is secondary to it if u have desire than there is adequate amount of hormones in your body before u had never this problem so your testosterone level is adequate no need to boost it just relax and through all your worries open communications with your girlfriends identify sexual stimulating areas in your body which help u to make more exited sun set focus method is very useful for it. read on google about it no need to worry get well soon thank u