Most Helpful Guy
If you feel as though you can't live without him, then that is love. There is no need to test the water with other people. It's like the grass is greener on the other side of the fence idea. It really isn't, and this is coming from a single guy. I've spent most of my adult life (24 now) single with a 6 month relationship where i realised that i wasn't in love, and 4-5 month relationship where I was madly in love. I am now envious of all those in a relationship because you have someone to spend your life with, to share your life with. Someone who wants to be there for you always. I find so few girls attractive and smart that for me to fall in love again may take years.
This is the guy you could potentially spend the rest of your life with, hence why you are scared, confused and want to see what being single is like.
I think you are at the stage where you have one of two choices -
Stay with him, and prepare to spend the rest of your life with him
If you dump him, there could be no turning back, the guy will be broken, he will hate you for it and if you feel that you made a mistake, there may be no second chances.
So it's your choice. If you feel as though you could not live your life without him, then he is the one for you. If you can go a month without talking/seeing him, then you are not in love.
Most Helpful Girl
What do I think?
You currently possess one of the most prized advantages on Earth. YOUTH. Whether it's an old man whom the world has torn and tattered his happiness. Whether it's an old woman with saggy titties, widespread spider veins, and pictures of her former beauty. Whether it's a child in a sub-Saharan country who can't even fully experience Youth with their pre-pubescent body and underdeveloped brain. YOUTH IS PRECIOUS. Youth is golden. Youth is valuable to people from all socioeconomic backgrounds, ethnicities, and corners of the world. Writers have divulged on 'the fountain of youth' for CENTURIES. Filmmakers continue to profit off of youthful stories and adventures. The value of youth is immeasurable. Don't waste it.
If you're not happy, you need to move on. Point blank period. You are evidently not happy. You appear to have lost your passion for this relationship. You appear to be disinterested in devoting much time and energy into this relationship. I think it's safe to say that this relationship has become dead weight keeping you from seeing/hearing/feeling the view of a mountain top. Cut it loose.
Whatever you do, DO NOT "KEEP YOURSELF OPEN TO BE WITH OTHER GUYS". That would make you a sneaky, shady, selfish whore. No offense, I'm just being brutally honest because sugarcoating won't get you where you need to be. "Getting to know other guys as friends" is a nice, flowery way of saying "keeping your romantic options open while you inappropriately claim to be with one man". Maintain respect for him and don't potentially expose him to heartache.