Summarize this article in one sentence.
If you don't absolutely know that he likes you, don't act upon it. You may ruin a friendship based on rumors that other people have told you or an assumption that you've made because you think he likes you. There are some tell-tale signs that he is truly into you. He consistently asks you out. He persistently tries for body contact. He persists on hanging one-on-one. The longer you wait, the worse it'll be. His feelings will grow and it will be impossible to maintain any kind of friendship after you tell him the truth. You can pretend all you want that he'll "get the hint" if you simply avoid him. Well, he won't. You need to find a time to talk to him. Make it a time when it's only the two of you, so that he doesn't get embarrassed in front of a group of people. Write down what you're going to say before you say it. If you fumble over your words, you'll make the conversation longer, more awkward, and a worse time than it needs to be. In your plan, you should have some points about why you aren't interested in him. Don't attack him with reasons he's grossjust be honest about why you're not into him. You can't seem to move on from your ex-boyfriend. You just aren't physically attracted to him. You like someone else. If you have a conversation on the phone or over text, you can still implement all of these into your conversation. The most important part when doing that is being ultimate. Make sure he knows that there is no future chance for the relationship.
Know that he likes you. Don't procrastinate. Don't avoid him forever. Make a plan. Talk over the phone.