Thank you everyone for all your replies, its been a struggle to navigate this, she makes me feel pressured to talk by being how she is so I fill the conversation and I often feel uncomfortable knowing that even though I have no deep secrets or anything, she is listening and absorbing what I say.
Sometimes she will call me her best friend and make me feel bad if I don't keep up contact. I feel sorry for her at times, at work she had other friends that she seemed closer to yet it seems to be me that she likes the most ... and I have an uneasy feeling as I said
I am sure she has a full life, and mental health is defo not the issue but thank you for that perspective! , e.g. she did some errands (in her words) all day, so i asked 'what errands' and she wouldnt answer and asked me what i was doing in that moment. It feels so obvious and deliberate that she shifts the focus to me and learning about me but she had a full day of tasks.
I am grateful for all replies, you have all been so lovely to help and I will think about everything carefully and cautiously for a few days