depresses sad?

I feel quite sad a lot of the time, but when im with my friends im smiling but often I do stare into space & have million things running through my head. but I just want to be happy for again, I havent been happy since somewhere near valentines day! the reason why I think im sad are..

1. im in love with this boy & we used to hook up, & he thought I was mucking him around cause I wasent ready for a propa realtionship & then we had an argument & after that he said lets be friends, but I was ready for a realtionship I just dint realise at the time & I really do love him & this was in july. & im still liking him tbh, & he know I love him & he dosent feel the same no more so I mucked up my chance & I really regret it. & everytime he chats up a girl I get annoyed & put a sad face on my name & I get jelouse & he ask whats up and I just make excusese

2. exatually I just turn sad for no reason & feel like crying when I dont know whats up with me?

3. I want a boyfriend, someone who is gna prove boys arent the same.

I think its love problems. & it really get to me I somtimes even cry & night.

I dont know what my question is but if someone could tell me what do to? or help me anyway please do comment. & am I depressed? “/