You don't "put" the anger anywhere; your boyfriend lied to you. I'm glad he feels it is easy for him to quit lying but he doesn't get to make the rules for you. You get to say, "You lied to me and tried to hide it, if I catch you sneaking around for any reason OR lying to me again, I'm leaving". You have to direct the anger, figure out what it is telling you (that you do not like being messed with in that fashion) and what you are going to do about it so you do not have it in your life anymore. Working on it means you both have to keep the communication lines open; he has to take an interest in letting you know where he's going, with whom, doing what and take an interest in your activities. I'm not saying "control" or approve or anything like that but true partners enjoy making sure everything is running smoothly between them (the opposite of "sneaking around") and keeping the other person informed about how they're feeling and what is going on in their life. No more, "It's good!" one or two word responses when you ask how he is or what he's been up to, etc. Not so easy as he assumes.