I just got out of a relationship because my bf was addicted to porn. I was only with him for 4 months and he was ready to move into a threesome. He could only finish after a long time and with masturbation. This problem is not an easy fix and if you only have 7 months invested I would move on. Porn is becoming a bigger problem because of the internet. I agree depression affects one's sex life but he lied about the porn so he may be using depression as an excuse. Good luck in your decision.