WwWtTtFfF????????...?

Ok there is this one girl that i have liked since the beginning of the year.for identity reasons lets call her jessica. Me and jessica used to be really good friends and I used to think that she liked me but I was very nervous and didn't want to push it and scare her away in case she she actually didn't. But then me and her slowly drifted apart in our friendship and we aren't even friends anymore, just acquaintances. I still like her ALOT though. But recently there is this girl from school who ive become really good friends now. We'll call her lindsey. Lindsey always said hi to me in school and now that school is over she always IMs me and calls me darling. The problem is that im not sure if i like lindsey or not. But ii am always thinking about her every single minute of the day and thinking about how we would be if we were going out. This is confusing me because this used to be the same thing with jessica but not anymore. Im even more confused because i don't know why im thinking so much about lindsey because if I had to choose between who i wanted to go out with it would be jessica. Whats going on with. This would be easier if i could just tell jessica how i feel about her but she has this guy who she isn't going out with but i think they have a thing for each other and i don't want to put her in a awkward position and she out of my league anyway. I would want to tell lindsey about how im feeling but first i would hate to get rejected by her if i later find out that I do like her because no other girl acts that way towards me and i would hate to ruin our friendship.Even if she does like me im scared that i might find out that i don't actually like her and that was a momentary thing. And finally even if we both do in fact like each other im so scared that i would spill out in guilt and tell her that i also like jessica and i believe that lindsey deserves the full attention of any one who has feelings for her. please tell me how i should act towards my feelings because i am not able to figure them out