What to do when my boyfriend whom we will soon have 2 kids together lies to me about drinking with friends?

Unfortunately there isn't any way to stop him.

He is a very self absorbed person, so it seems.

Does he do this often? What does he say he was doing and why he didn't answer his phone?

You are either going to have to give him an ultimatum.

Or just leave the guy. He sounds like he may be young.

And wants the best of two worlds. He has a family now. Although I think once in awhile going out is ok, but not answering the phone is not RIGHT. It would be nice if you both went out together.

This is something that you and your children will have to live with. Your the only person that can decide what path to take.

Stay and endure his behavior or do something about it.

I would Opt for the Do something about it.

Since you have a second baby on the way, he feels like you wont leave him for the kids sake. And you probably feel like you have nowhere to go. You probably Depend on him more than he depends on you.

Dont let this guy be the bully that gets his way.

Maybe you should go out and have a girls night out and let him stay home and worry about where your at and what your doing.