Dating can be exciting and fun. Or, it can be world full of unspoken rules, boundaries and expectations. And if you know what you want, it can be a challenge to find a guy who’s on the same page as you. So, to help you navigate the modern world of dating, you’ll want to avoid these three types of men.

Jenna Birch is the author of The Love Gap: A Radical Plan to Win in Life and Love. Birch’s book is a guide for smart, driven and assertive women who are “winning in life, but losing in love.” And in it, she identifies three types of men that are dating trouble – the kind of guys you’ll want to avoid if long-term commitment is what you’re after.

Almost Boyfriend

The Almost Boyfriend is just that: you do couple things together, and for all intents and purposes, your friends and acquaintances would call you a couple. But if he feels like the two of you are nearing couple status, he’ll go MIA and stop returning your texts and calls.

The Disappearing Act

Beware for the Disappearing Act. As opposed to the Almost Boyfriend, who keeps a safe distance, this guy just up and leaves. How can you see it coming and prepare yourself? He can be evasive and hold back. Another warning sign is that he either just went through a major life change, or it’s coming up.

Mr. Terrible Timing

This guy is the trickiest of all three. You have a great connection and everything is perfect, except for one major thing: he’s not ready to stick around because he wants to explore more options. This guy will push the boundaries to see what he can get away with. Or, if he breaks up, he wants to stay close friends.