I have been with my boyfriend for almost 3 1/2 years but for nearly 1 1/2 years we have had no sex.
I am 24 and my boyfriend is 25, when we met we had sex near enough everyday. After a few weeks of first meeting each other we slowed down (which was expected) to maybe once a week, which was fine.
After a few months it slowed right down to maybe once a month or once every two months. I always initiate sex and he used to always use excuses such as tired etc. There was period when we went without sex for 4 months which broke my heart. I have tried speaking to him about it but he gets so stressed out saying that he finds it difficult, but he did use to look at porn quite a bit. We last had sex a year and a half ago and it has gotten to the point now where I have given up. He says he loves me and I do love him so much but I really feel like giving up sometimes. Feel free to ask any questions or give any advice..

How much porn does he look at today, now?
Self gratification is much easier than trying to please someone else. That is why porn is so prevalent. The ME generation is rearing it's ugly head once again.
Seriously if he does not want to have sex and he is not using porn then he may have a medical condition that he is afraid to discuss with you. He could also just not be that interested in you. Your choices are move on, or MOVE ON.

There is something wrong with this relationship you aren't aware of... and I don't think its porn...

He's not happy about something and isn't man enough to be honest with you, possible because he is trying to avoid hurting you... and yes... a guy can be really unhappy about a situation with a women, and still be trying to find a way to exit without hurting her.

Because I've been in a couple just like that in my early 20's.