Typically, a man who is losing interest stops calling you or doesn't call as much. You might find yourself calling him way more than he calls you. This is probably a sign that he is spending more of his time calling someone else. He may also stop returning your phone calls, emails or texts. Or he may wait days to return them with no excuses.
A man will usually also stop spending as much time with you if he's losing interest. He may make plans and cancel on a whim or agree to a date and stand you up with no excuses at all. He may also make excuses to not spend time with you, especially if you ask. For example, he may say he had to work late on days he got off work early, or that his friend invited him to a game that he couldn't pass up. In fact, if he spends more time with his friends than with you, consider that as a sign he's losing interest. In addition to this, he may show less affection. He may look annoyed if you try to kiss him or he may avoid having sex with you.
Your man may stop caring what you look like if he loses interest. He may not even notice or care if you get a new haircut, buy a new dress or amp up your workout plan. In addition, he will usually stop doing nice things for you or even paying you compliments. If he says anything about that new dress, it may be critical. In addition, that sweet little thing he used to do that made you melt will probably be nonexistent.
You may notice that you argue more with your man, and that he turns every little thing into an argument or a disagreement. If he's constantly picking fights, consider that as a sign that he's losing interest. In addition to talking to you less and arguing more, he may start being secretive about his whereabouts and his life in general. He may also start using "I" instead of "we" when talking about the future, meaning that he does not see a future with you in it.
As reported on WebMD, according to authors Greg Behrendt and Liz Tuccillo, the authors of the book "He's Just Not that Into You," there are many ways to tell if your man is losing interest, and it doesn't mean that you're not a great catch or a spectacular person. It just means that for some reason, he's just not that into you. A few signs that Behrendt and Tuccillo reveal are that he stops asking you out, he stops calling you, he stops dating you, he stops having sex with you and starts having sex with someone else, and he only wants to see you when he's drunk.