I'm gonna come at this from a guy's perspective....

You spend almost all of your time together when he is off.

I would imagine that he just assumes that you will be with him on Easter.

Wherever that is, or whenever it is, he assumes that you will be together doing whatever, wherever. He probably doesn't know himself yet, so he feels that there is nothing to tell you, or invite you to..

Most guys are boneheads. Most guys will make the assumption rather than ask.

"That's my girl, and she will be with me"...

Not a conscious thing mind you..

Doesn't make it right or wrong, and I totally understand you wanting to know beforehand...

Could it be....possibly...

Now that you are looking to define the relationship a little more, that you are trying to place an expectation on this a bit ??

I would use this as a building tool for the future with communication.

Express what you would like to see down the road...

From what I know about him, he is different from the guys that you have been with before....???

Don't treat him like the guys you have been with before...