4. He tries to change the subject awkwardly.
You should get suspicious if your boyfriend starts to bring up a completely different subject in the middle of a conversation. “He tried to change the subject, but I just laughed because it was so awkward. He suddenly asked me about one of the guys he used to play basketball with,” said a teen. If you’re determined to stay on the subject, make sure you press him for an answer by saying something like, “Don’t change the subject. Can you answer my question, please?”