Rob312
I have a suggestion that might sound dumb but hey, its a suggestion. The problem that you seem to have as what Stephen wisely explained it .. “Escapism is what you are engaging in: nothing more nothing less. “ You are bored and you have a door of pleasure that is OPEN right in front of you at any time to ESCAPE to it leaving your boring life behind. I have a rather physical suggestion than mental. You can actually purchase a software that blocks adult content to stop you from accessing it. One might say but you can enable it anytime, however you need to share your problem with someone who can help you with this, someone who has the owners details of how to unlock that software. Hence you do not have access to it and that someone WON'T give it to you.
There is a second part to the suggestion .. you need to sit down and think hard of something you like to do and engage init a lot as you mentioned may be playing your guitar. Therefore when you are alone in your room and you get bored you can't access porn and you will have this space inside you to fill then you will be FORCED to engage into the other activity i.e guitar or other.
Its a suggestion, it might not be an inelegant suggestion but it could work

.. Steve’s article about shifting your thinking can effect the change of your mentality greatly while this process is taking place.
Thanks
Ali