[header] How to know if you like someone or if you're just lonely [title] Know the typical signs of a serious attraction. [step] If you're not convinced you're really into someone, it's good to know the usual indicator of a strong attraction. In general, when you really like another person, you seem to think about them all the time, even when you're not with them. 
You can't wait to learn all about them. [substeps] You're excited to introduce them to your friends.