should i message her and tell her how i feel or naw move on ?

[Ima]

so i met this really sick babe of a girl at a party in the summer and i got her number and we would talk everyday getting to know each other and flirt all the time with the typical text convo like "hehe or aww" i know she likes me but i feel like she didnt want to show it becuase she thought she was going to get hurt. So in september she went to western ontario university for school and i stayed home to keep skateboarding to enter contests and stuff, we always keep in touch like late night txts, i told her once that "big day tommorwo everytrick i land tommorwo in my run is for you, lol goodnight missya" she replied with "gooooooooood lluck!? night!!" i still thought i had a chance with her even tho she is at university so i tried hard to still keep going for it, so one night i texted her saying "there is just something about you thats different than all the other girls i really like you Jen" she replied with "aww, i dont really know what to say to that" than i said "now its werid" than she said" no, not that weird" so after that i knew she likes me to becuase she wouldnt of replied back if i said that, than i said one night really drunk to her that "I HAVVVEeee a hguggge crush on you JEN" than she replied right away saying "cuttttttteeeeeeeeee " after reading these txts i knew i still had a chance becuase she thought i was really good at skateboarding and would always ask me "good luck with you're skating today" or "hows skateboarding" or "are you coming to the party" but a few days ago i figure out on fb she had starting to date this guy but she never told me, when i heard about this it CRUSHED ME, i dont understand she would text me saying all these things back even tho shes dating someone, she deleted me off twitter and fb so i deleted her number, but i still have feelings for her but i dont want to msg her and tell her that i really like her still and i know i waited to long to tell her but what i dont get it that she would still text me back and not say to me "sorry i have bf" or something like that, i dont want to give in and tell her i want her to me mine becuase no one wants some guy to steal another guys girl, but i really wanna tell her,should i msg her and tell her how i truely feel about her, that i know i screwed up on this one and i know we could of being dating but i blew the chance but i dont under stand why she wouldnt of told me in the first place instead of sending these mixed messages to me, ill get over it up i just need some help to explain to me WHY ???, IT WOULD BE REALLY SICK IF SOMEONE HELPS ME OUT PLEASE and TELLS ME WHY THIS HAPPENED THANK YOU for reading this