Now that you're leaving, I love you like never before

Ughhhhhhhhhhh.
Days are going by so fast & I feel like I'm going NOWHERE.
At times I'll just be super happy, like nothing can get me down.
& others I just feel really really low about myself. I just never feel good enough for people, and even sometimes myself. I don't understand, because even though people may not believe it, I DO want to make people happy all the time. Its like they don't notice and I'm wasting my time.
And as stupid as this sounds, I've been noticing other people a lot lately. Like I'll be super jealous of someone. & not just the way they look or something, but of what they have. No, not money or other pointless things like that. I mean that they have people that they are in true love with, that love them back. & they are so young, but SO happy. Every kid I know is suddenly falling in love, but I just havent really gotten the memo to find someone for myself. Or when I really start to like someone somthing just has to mess it up and then its...over. & it makes me so upset and I get the worst feeling in the pit of my stomach. I honestly just dont feel good enough for anything or anyone anymore. & I know that sounds stupid and emo but it's true and I don't like admitting it. It's come down to where I just don't know what to do. And I'm not writing this to be like 'ohhhh i want LOVE that's all!'. Because I understand I'm just 15, [16 in 9 days!] and I know I have so much time. But I just don't like feeling like....this. I have no idea what 'this' is, but its a really weird and unsatisfying feeling. When my friends or anyone come to me with any problem at all, I listen and I always know exactly what to say to make them feel better and help the situation, but with myself I have no IDEA what to do. I can not give advice to myself, I just cant.
Hopefully I'll get through whatever I'm talking about. Because I really don't know what I'm talking about or how to explain what I'm feeling because its intense and I can't come up with the words so this blog probably sounds so stupid.
I just, do not like this feeling.
That is all.
Okaybye.