Search Results: too young to settle

I've been dating a man who I love with all of me since high school, and we've had a very strong and happy 5 years together so far. We both have said we already know we are who each other wants to end up with in life and we plan on marriage. There are a few issues, like every relationship has, but nothing we don't ever work out and carry forward. However, this one is pretty big, I think. And he doesn't know about it. I've kept it bottled up to myself in fear that he'll read it the wrong way and there goes our amazing 5 years together and the many future years to come. The issue is, I wonder if I settled too quick. I love him. And I know he is the man I'm going to grow old with. But I can't help but feel like I got serious too fast. I've heard that you should never get serious with anyone during your college years because you meet so many people. And I have. I never want a relationship with those who I've met, but I'm still attracted to them. To the point it doesn't feel right. I shouldn't be feeling so attracted to other men. I get these cravings to just go out and have fun with other men. Not necessarily hook up, but just experience fun times with other men. I want to tell my boyfriend how I feel, but I know he would immediately take it as a break up, I'm done, and never coming back. That's not it at all. I know he's my forever... I just think I found my forever when I wasn't ready to. I feel like I should have let myself venture before I got serious and committed myself 100% to him. Because now, I'm stuck with this immature feeling and I can't understand why I can't just shake it off and ignore my desires and focus on my love for my boyfriend. So what do I do? Should I explain to the man who I've spent the last 5 wonderful years together that I think I settled too young? And him definitely take it the wrong way? What if this goes on and we end up marrying and I'm still feeling these desires to experience? What should I do?