My sister takes every guy I like?

My sister is 19 I am 15. Ever since i starting dating and like guys my sister gets in the way and ruins it. The first guy i met and dated I "loved" (or had deep feelings for.) he left me for my sister and i even told her hey it would really hurt if u dated him but she did anyways. after that any crush i had she fucking dated and slept with! then, about 3 nights go we were hanging with some friends which included this one guy i thought was really cute and i told her how much i liked him and he even said he liked me and he held my hand but today he was ignoring me and i found out she's talking to him and wants to date him and they are dating! I am so fed up with this! don't say she's doing me a favor! I wanna do something evil to her bc im being hurt everytime i like a guy! She said "not my fault you like every fucking guy you meet" first, not true and second that doesn't mean she can steal them.
My sister takes every guy I like?
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