I don't miss my boyfriend, is this a bad sign?

I've been with my boyfriend for a year and a half now but he's much clingier than I am. But the real wake up call was when I went on a week-long vacation last week...I actually did not miss him at all. When he called me during the vacation it was like "hey good to hear your voice" but not "omg omg miss you so much". Is this even normal? Or even during business trips...I don't miss him, I just focus on work. I'm kinda worried because I'm already much less clingy than he is so I don't know if this is a bad sign or something. Please advise!
I don't miss my boyfriend, is this a bad sign?
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