How do I choose between two amazing guys?

I know this question is long but i really need help. I will love you forever if you take the time to read it, think, and try and help. I really really would because i don't really want to talk to any of my friends about it. I know i shouldn't bottle it up and i should trust my friends but saying out loud will make me feel one hundred times worse. So i have had a boyfriend for six months and i'm crazy about him and he is amazing and sweet and funny but there's something kind of missing. i think it's that we didn't start as friends. We met and he asked me for my number and he pretty much just became my boyfriend. And at my age (14) where a lot of stuff is really confusing, i want to have a boyfriend who i can talk to about anything and have tons of fun with and who is first and foremost, my best friend. of course i'm not looking for a totally serious relationship right now, just a fun, trusting one. Theres this guy at my church named johnson and i've liked him since i was little. we kinda weren't exactly friends for a while (meaning we just didn't talk a lot) but recently, we started talking more and more, at church and on facebook. he's really and geeky (i like geeky :) and super nice and he makes me laugh and i make him laugh and yesterday at church we kept looking at each other and we laughed a lot in sunday school and my knees started to shake every time i thought about him. and i feel like an awful awful person because i like this guy thats not my boyfriend and i've cried over it a lot which makes me feel worse because i wish i would just do something about it but i don't know what i want. i feel like i don't deserve either one of them because i'm such a terrible person!! ugh. it's just... johnson brings out the best in me and we have so much fun which is really important to me and we laugh a lot together. but mark (my boyfriend) makes me happy and respects me and just wants to make me happy. which makes me feel even worse because i so DO NOT want to hurt him. he's just so amazing... but so is johnson. i try not to look at johnson or flirt with him at all and really we don't flirt... we just have fun. but it's so hard when you have this kind of connection with someone. blarg. i kind of only know mark as a boyfriend and not as a person. but i was hanging out with mark yesterday and he was so happy and smiley and he kept kissing me and then breaking out in a grin and telling me "i love you. you're amazing." and i really do love him but i feel like he doesn't really know me and sometimes i'm just a different person around him and i HATE IT! how can he really be in love with me if he doesn't know more about who i am. Arg. i'm crying again. i feel so terrible!!! i don't want to hurt mark at all but i want to tell johnson all this and i don't really want to tell mark. well i do... the thought of telling mark is just way scarier than the thought of telling johnson. is this a totally bad sign for mark and i trusting each other more than we do or just more of me NOT WANTING TO HURT HIM? sometimes i when i'm with mark i just want to be with johnson. isn't that terrible? but sometimes i'm perfectly happy to just be with mark. i'm so awful! uuugh. it's just that... i'm loud and kind of slow in the head and i run around screaming with my friends. thats how i have fun. being my loud obnoxious really weird self. and johnson knows the weirdo me better than mark does even though mark and i have been hanging out for six months and johnson and i see each other about three times every two weeks. mark is always telling me how much he loves me and how he would do anything for me... and for the past week, which is how long i've been thinking about johnson, all the stuff he says just makes me want to cry. AAAARGH! i'm so terrible!! mark was acting kind of weird the other night so i asked him what was wrong and he said "i just have a lot on my mind lately" and i asked him if he wanted to talk about it and he said no... this wouldn't really bother me if he told me other things... or really of i just felt like we could talk about anything without judgment or weirdness. ahhhh. i'm crying so hard because i really do care about mark and i think that if we break up we're just plain over. we go to different schools we have different friends and he doesn't go to my church so i think theres pretty much zero chance of us just being friends because why would he want to hang out with his ex girlfriend if you guys never really had just a friend relationship? and what of i break up with mark for johnson? will that create a habit of me just leaving guys when another one comes alone? is it cause i've liked johnson for a really long time as just a friend and i've only ever known mark as a boyfriend? am i being a horrible person or am i just forteen and confused about dating and really have no idea what falling completely, madly, head over heels in love is like? i've tried to ignore my feelings for johnson but i can't and i've trie