silentorspoken 😯confused

i know you've all seen this one before....

so as the subject indicates, and I'm apologizing in advance if it seems like childish drama...but i really need help....

...so theres this guy...

i know, not the best start. lol.
i think i like him. I'm not positive, but I'm very sure that i do. and i told him last night (I have no idea what possesed me to do that...haha) and he likes me too apparently, and i was like ok, what now. and he said well if i was you I would ask me out, and i did. so we're gonna hang out n all. here comes the problem....

...one of my really good friends has been like crazy in love with him for the past year. And i'm afraid she'll think that I'm "dating" him because she likes him, which is not true at all. I've liked him for almost 4 years now..and i know she's just gonna hate me when she finds out, which she eventually will. I can't hide it from her forever...AHHH!!!!!!!!! i love her to death and she's gonna kill me...i know she is..... :/