1st Problem: There is always a reason for everything, and certainly that guy is not for you smile . Yet, there is no need to stumble down and cry, most probably you deserve someone who's better than him. Have fun sojourning the tracks of love!
2nd Problem: People tend to get carried away with feelings, and maybe that time, your friends were too excited to wait. But still, they are still wrong about their statement. Try to talk to them in a calm, and friendly manner. Open up and listen to their side too.
3rd Problem: Approach your dad in a way he likes, and talk to him about the attention you need- that you most probably miss his hugs, his humor, and his presence. Never be afraid to talk about it, your dad loves you.
I hope that helps smile