do i have the right or none at all?

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There's this boy whom I'm so in love with. I don't know if this is really love but every time I see him I get that butterflies in my stomach ( a million, in fact). He is the only that I've allotted my time to. we were not into an intimate relationship. I know him by name and he don't know me at all. Perhaps, by my name too but there's really no connection. He is always in my mind that I couldn't even study my lesson well because of too much fascination with him. He was just introduced to me by my friend (who was also a huge fan of him), not personally though, and by that moment i thought that he was just some kind of ordinary student. Second semester arrived and to my disbelief we were classmates! (hell yeah. a wish come true) I did every thing for him to notice me but unfortunately, he did nothing. Days passed and rumors reached my existence that he had courted this girl in our campus (also, a well-known one!) and i got so very jealous. Jealous to the extent that hated him and that girl. He just like broke my heart into pieces but I asked myself, do i have the right to be jealous? considering that he is not mine. This was the second time i felt like cheated and that my heart was broken. I rarely felt this kind of feeling towards other people. does this mean that, even though he's just my crush, I am a possessive soon to be girlfriend? and do i have the right to be or none at all?