Impotency when being intimate.

From the age of 16-22 I was a very promiscuous guy. Feeling convicted because of my religion, I stop the random sexcapades for good and turned to porn as an alternative (big mistake). For the next four years I used porn to release my sexual frustration but I never had sex with another human being, during this time though I would have gaps between using porn which did not make me impotent, until porn apps became available on smartphones. From the age of 26 to now 32 I have used porn on my smartphone from once to five times A DAY! This has heavily damaged my sex life with my new found partner. When we get initmate, Its hard for me to get and erection and if I do get an erection it is hard for me to keep it for more than 10 minutes. This is SO EMBARRASSING bexause I want to be married one day and I  sure do not want sex to be an issue. I REGRET even using porn to keep me from being promiscuous, ive literally made things worse for myself. I am glad that I stumbled on this Reboot Nation website, I am looking forward to interacting with you all because I am now on day 2 of my rebooting. I have bot looked at porn and I try my best not to dwell on sexual fantasies. If any of you guys have any tips or tactics can use to help me out. I would greatly appreciate it. I wish yall the best in your reboot journey! Much love!