<human>: Could you distill the essence of the text into 1-3 sentences?

I've been with my boyfriend for a year and a half.  We have had a great time.  He's loving, caring, loyal, sensitive and makes me laugh.  Of course he can also be stubborn and boring at times.  Overall I'm happy with the relationship, though the sex isn't as exciting as it could be (he's not as willing to experiment.)  

Lately I haven't been feeling as attracted to him, haven't wanted to have sex with him, and instead am thinking about it with other people.  I have had crazy feelings for an acquaintance, and we've been flirting a lot.  I have been on the verge of kissing him!

I'm 23, not ready to settle down, and just about to graduate university with no idea where to go next.  The boyfriend wants me to move in with him, and I don't think I'm quite ready for that.  HOWEVER, I could see this man as a dream husband some day!
<bot>: I love my loyal boyfriend but am young, feeling bored, and feel attracted to other people!  Should I break up?  What if he's the "good one that got away"