Should i bleach my hair?

I had my hair stripped from black to gingerish just over a year ago and i have used demi perminant colours ever since and had it highlighted a couple of times. now i am fed up all my friends have gone from dark to blonde so easily without the ginger and i want to go blonde. if i was to bleach my hair again would it fall out! the ends occasionally go straw like if i have left it to frizz or in plaits over night etc. i have about an inch of split ends but my friend has bleached hers about 10 times in a couple of weeks and although it is really thin now it's still there! help