Hi. I'm sorry to read this! I don't know what is up with him and it is hard to analyze. But I WILL say that I'd not appreciate this in a boyfriend. So, here's the deal. We date for a reason. You've not been together that long at 14 months and during that time, you are supposed to be judging him for long term potential. From what you've written, he should not meet your criteria for a long term partner. Ignoring you, checking out women on facebook which are REAL woman he could contact and web cam stuff . . . which is porn on steroids and very personal. Porn is something a lot of men do but he lies about it and then does the live thing which takes it to a higher level. But mostly, he ignores you and is distant/angry at times. All that in less than a year and a half together. Picture 10 years from now!
So, my best advice to you is to consider that he is not long term partner material and that you can find someone that is a better match for yourself that you will ultimately be more happy with. Porn can be an addiction but I don't recommend you try to work it out or go the long haul with him either way (addiction or not) as you don't have enough time invested in this to take the risk of a lifetime of unhappiness and mistrust. good luck