Does it seem like he miss me or am I quick judging?

Me and my guy got into an bad argument and he always saying stuff and making decisions over reacting at times. He been mad days after the argument.  He always threatened to change his number when he got mad and he finally did it after he was talking to me Monday, still upset about the argument. He later admitted on Facebook  the next day he overreacted and regret changing his number. He has made another whatsapp account before the number change after he already had an account registered under another number he had in the past. He shows up in my whatsapp contacts but he be on there as if he's wanting me to write him or he's waiting. He hops on and off especially when he see me logged in he will stay online until I log off. he knows he's showing up in my contacts. I don't get why he made a whatsapp with his number he just disconnected all of a sudden when he already had one active.