moving anxiety

i have been agoraphobic for a year now. i'm getting better at some things though. i'm living with my parents right now in the suburbs. i still cant drive, so i found an apartment in the city that is close to a lot of things so i will be able to walk. i was really excited about it at first because i cant stand livving with my parents and want to be on my own. but recently i've been getting nervous that i cant really do this and that when i get down there i will still be too scared to leave the apartment. i havent signed anything yet, but i am going to visit the apartment this evening with my sister. the girl who already lives there knows about my 'problems' but i'm very scared that once she actually meets me and finds out what agoraphobia is like that she wont like me. i'm also scared that even though i'll be so close to so many things i'll be too afraid to walk down the street without having a panic attack.

do you have any suggestions or advice? thanks.