I can't tell you anything about making friends because I'm not really any good at it myself. But I can tell you how you can handle suicidal problems if you have them in the future - you go around your parents and call 911. It probably won't go over well right off with your parents, but if they won't listen to you and believe you about suicidal thoughts then you need to take action on your own. If you have to make the difficult choice think of it this way: "is it worth trying calling 911, maybe getting my parents upset a while, maybe ending up in a hospital a little while - things that will pass - for giving life another chance?" The rational response is yes, the temporary trouble is worth the chance at living.
And life can change a lot if you give it the time to do so. You're not that far from being able to make your own decisions on clubs, internet relationships and treatment. You'll also have the chance to get into college with other "brains" with whom you can relate.