I need Some advice???

I'm an outgoing person, I love to have fun,living life to the fullest is my thing.On the other hand my boyfriend is a little on the quiet side.At times my realtionship gets boring.I feel like if I tell my guy it's going to break his heart since he thinks everything is going so well.Not to mention the whole school is going to think that I'm bogus. I dont want to be leading him on like everything is all good when it's not.A part of me likes him and then a part of me just wants us to go back to the way things were as friends.(But our realtinship as friends will never be the same).I dont want to lose a friend or break a heart. It looks like I'm gonna do both though.