Healed - I don't think his actions reflect that he wants to get rid of you or that you are too much for him. I think he was trying to (and I do not agree with this - I know some people do) help keep you safe or accounted for because he cannot supervise/watch/ be in touch (whatever way you want to say it) all the time.
I don't see a problem sending the email if you want. And I hope he reassures you if that is what you are looking for.