If you care about someone or you are interested in them romantically then I like you is something you say so that they understand how you feel. There are many I like you quotes, some from very well known people. The best relationships are usually those that start between friends, and the bond grows stronger as you spend time with that person. Saying I like you may help the relationship transition from friendship to something much more, but it also makes you vulnerable in some ways as well. You may be worried that your feelings will not be returned, and this can cause you to hesitate before you say the words I like you. Don't let this fear of rejection stop you from expressing your feelings because the other person may feel the exact same way.