What should i do in this situation??

We met in uni and she liked me.. we met hours before class, at lunch/dinner, scribble in each other's notes etc...months later when I realized and told her I like her it was too late. She was distant, it took me 5 months to get her to come out again - despite her telling me she doesnt feel it anymore and that Im better with another girl. We went for dinner finally and had a good time. A few weeks later, I made her flowers in her fav color... she loved them and put it up in her work. I might be too immature and rushed it... she says the 'platonic friends' and sorry for making me feel this way. I told her I cant be friends... then she gets mad at me - she said she isnt going to date for a long time, and that she hates this place. I asked her if I can help I was worried, she says lol no you cant,no more drama and told me to leave her alone. I would msg her occasionally to see how she was doing. In Dec When she replied, I said something stupid again.... Then a few months later I got her a gift to apologize, I took a pic and sent to her and to see how she was, she says no more, please just stop.

I dont know what to do.... I just want to talk to her again... her birthday is coming up in a month. I have a gift for her from my trip. She wont pick up my call and if I msg her she doesnt reply. She doesnt have facebook or anything. What should I do?? I miss talking to her..How can I fix this??