Most Helpful Girl
Not necessarily. Some ex boyfriends who want to make contact will do, whereas some may be too shy too or hope you will. If he wanted to talk to you, he would've responded to your text by now, not leave it 5 days. It sounds like he's trying to avoid sorting/paying for bills to be honest!
Again, guys are different. Some will initially miss their ex but then it eventually fades, some don't miss them and then they start missing them over time.
If you miss your ex and want to contact him in relation to rekindling your relationship, then you should probably make the first move.