Love can be expressed in different ways...

I feel that she loves you too much and that's why she don't want you to chat with anyone else.

In films you may have also seen some wife's who is loving her husband in the way what you expects and cheating from the back. So don't compare filmi duniya and real life.

And just 1.5 years is nothing in a married life.. I hope you will get what ever you expects in future..

Enjoy your life and respect each others.

All the best wishes