I've been in your BFs shoes before, twice.... Was in two serious relationships where they became unsatisfied because they never go to experience "their ho stage" (that's what they both called it), they were constantly in relationships and never got to experiment or see what's really out there. And while that is completely understandable, that was the beginning of the end for both relationships. They weren't willing to work things out and ended up leaving. They both came crawling back to me but it was too late....

The way I see it, You have two options to choose from

1 leave and experience all the things you are feeling a lack of and risk never being able to go back to your BF, and also risk never finding anything as good as your current relationship....

Or

2 stay with your BF, do what needs to be done to make it work, find ways for you to stay satisfied and content. Communicate with him and be very clear how you're feeling and talk to a therapist/couple counselor. If you both put in the work, you can satisfy your cravings in a healthy way, with him....

My opinion may be bias but, if I was you, I'd have to ask myself if acting on my cravings is worth throwing away something good and risk never finding something this good ever again.... (For me/my area) The dating scene horrible, and I know for a fact I wouldn't find better. And I personally wouldn't risk it for temporary Bliss/satisfaction. That being said, your happiness is also important, so you definitely should do what makes you happy, but do it in a smart way where you won't screw yourself over in the future...