I have to disagree, especially with a 2 year old. Both of my children went through a hitting/biting phase, as did my brother, who is now 14.

I don't see why it would be necessary to get into therapy with a 2 year old, who is capable of behaving (as evidenced by daycare).

Try to figure out what is triggering him to have the tantrums. Then figure out was he hungry, angry, lonely, tired, sick, vulnerable in any other ways?

It could be that he doesn';t know how to express that he doesn't like you to leave him, it could be so many other things.