1. The Second Date Theory
If you're lucky, you'll have chemistry with a man right away. Of course, sometimes chemistry doesn't appear during your first interaction. It might take a few more dates for you two to click. So don't lose hope until you go on a few more dates with him, just to make sure that he isn't right for you.
2. The Going with Your Gut Option
If you didn't feel any sparks the first time you spoke, then you might never feel sparks with him. Sometimes, your gut will be able to tell you whether or not you're going to work out. If there's zero chance in your mind that you'll ever work out, then you shouldn't waste any more time with him.
3. The ‘let’s Be Friends’ Option
You don't have to have the same type of chemistry with your friends that you should have with your boyfriend. That means that the guy you like might not be relationship material, but he is friend material. So don't kick him out of your life. Just agree to become friends instead.