Part time lover or have a relationship with best friend??

Ok so a while ago I had fallen in love with my best friend which i told because i had trusted her, she did not run away from which i realise how lucky i am to have her as a best friend because she understands me. Anyway it has been a year or so now since I have told her about how i truely feel about her and she has now told me she has developed feelings for me....I am not sure what to do should we start a relationship or should we just have a friends with benifits relationship, because I really dont want to loose her and if we break up I wont know how i would cope without her.

So is it a good idea to have a relationship or do you think she could be my part time lover??

what should i do?? please help!!!!
thanks :)

friends with benfits is always, always, always going to hurt someone in the end (especially seeing you two are so close as friends), bite the bullet and start a relationship or leave it and just stay friends.

Yeah, if you are so close, don't do half-measures. Either don't do anything, or start a relationship.

This is one of the dumbest question anyone has ask on this forum. Part-time or Full-time? You serious? If you really have feelings for her, there should be no doubt you want a relationship.