Why does he call me by my name instead of hunny now?

My boyfriend and I have been dating for 6 months. When we first started dating he would call me cute names like hunny or sweetie. Now he calls me by my name. For example he will say I don't know megan or whatever you want to do megan. Why does he do this? I was reading somewhere where guys sometimes do that if they are gonna break up with you or are losing interest. Is this true or is normal to happen in relationships after you been dating for awhile.
Why does he call me by my name instead of hunny now?
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