Professional Female seeks a double room

I am a professional female aged 32 looking for a double room preferably with en suite/ a buddy up situation. I am available to move from August and have a budget of £550 pcm inclusive of bills. Looking to buddy up/ have one flatmate.
I'm quite social and bubbly but also enjoy my quiet time. I’d like a flatmate who’s also a friend as I do like to socialise on occasion and would hate to live in a ‘lodger’ situation where it doesn’t feel like my home. This is why a buddy up/sharing with one other person would be ideal.
I currently have no pets myself but have always lived with cats and love dogs so a flatmate with a pet wouldn't bother me.

I work in charlton and drive so would ideally like to live in south east London or within 5 miles.