I Am In High School And Have Not Been Feeling

I am in high school and have not been feeling myself lately.. I have had a lot of stress lately with a break up, a friend who was partially suicidal, and just other ransom things. It's been getting better, but I can't help but be lost. My boyfriend and I only dated for 4 months, but we have been childhood best friends forever. Now I feel like we barely know eachother, and although I have a lot of good and close friends, none know me like he does. I am an A student who runs xc and plays tennis. Im at the point in my xc season where I just really don't enjoy it at all, and the stress has been changing my diet horribly. I am a very emotional person when it comes to situations and stress, but only at home do I have my bursts. I feel like people are bored with me, uninterested, and I don't want my family thinking that I'm trying to be dramatic or something. My 16 birthday is in like 10 days, and im just not really excited anymore.