I'm not going to contact my friends as often as before after I got a boyfriend
Why are you deciding to contact your friends less?
In my past relationships with girls I have found it easier to not deal with my friends as often.
It's always important to stay in contact with friends. I think you should still talk to them even if you're in a relationship.
If I don't want to talk to them, I won't and it's none of your business.
Cutting off your friends just because you are in a relationship is wrong. You will regret not having their support in the future if you do this.