Thinking of cutting my hair?

i've grown my hair for years and barely ever cut it and if i d cut it i trim a tiny bit myself but i was thinking its really gettin in the way between me and my boyfriend and were both upset about it i don't know hw i'm going to cut it but it has to be short my boyfriend suggested a bob but i saw a really nice style on tv where the sides and back were sort of shaven and the top was cut short and styled and i thught it was ncie if u culd give me some style or websites with those styles in them i'd appreciate it. thx oh and i'm 21