You are absolutely right in concluding, "i dont think there is any problem with me," and I applaud you for avoiding the common pitfall of blaming
yourself for
his issue.
He may indeed be addicted to porn, which would negate previous posts' advice to try to control it from your end, blocking TV channels or installing a "net nanny." The forbidden fruit will be only more attractive because it's harder to get. He WILL find a way to get it, so don't waste your time trying to be an enforcer. It's not your role or privilege to change him. If he's going to change, only he can do it.
You might want to search for an article here on WebMD called, "Why Men Like Porn " I tired to copy the link, but it didn't work.
Typically, men are drawn to porn because of some insecurity about themselves (NOT because of any inadequacy of their partner's). It could be sex-related (premature ejaculation, erectile dysfunction, perception of having a penis too small), but not necessarily. Other self-esteem-sabotaging issues (feeling unloved/unwanted; loss of job/identity, perception of being some kind of "loser" in general) will also drive men to porn. It's a "self-soothing" behavior, and it comes with no performance pressures or expectations. OTOH, after "acting out" (as we call it in SAA), he feels guilty and ashamed -- especially since he knows you resent it -- and that only serves to reinforce his feelings of poor self-esteem. That's the addictive cycle in a nutshell.
As for what you do about it, all you can do it let him know
exactly and unambiguously how you feel about it. Is it a deal-breaker? Can you learn to live with it? Can you help him work through the issues that are driving it? The actual
doing something about it
is entirely up to him. If you conclude it's a deal-breaker and he refuses to cooperate in a sincere effort to change, your only option is to bail. Sorry.