I imagine they feel terrible for making you feel terrible, but they probably also don’t want to keep leading you on. It’s better for everyone now that you know where you stand and they can stop pretending. It’s actually very very hard to tell someone you don’t want to be friends with them, especially if you feel sorry for them. It’s time to draw a line and move on. You are worthy of people who are genuine friends so don’t waste any more energy or emotion on those people. Maybe there are clubs and classes you can do now that will occupy you, or look out for other people who are on the periphery of friendship groups, or who tend to be alone, and see if you can get to know each other. Good luck and believe in yourself as a worthy individual