Is it normal that in so confused about this....

I'm a 28 year old woman & I have become friendly with a former female tutor whom I use to see twice a week for training we use to have great conversations & I found alot of trust in this tutor we would talk for a while & she has said things like we where destined to meet (as we have many things in common ) she would say we are like twins, I treat you like one of my family members, however when my tutoring came to end she said I was to keep In Contact with her plus she invited me to visit her at her home, Which I have done a few times.
The other week there I took some paperwork for her to look at & as she was reading through it she received a phone call from someone whom she was speaking with for about 5 minutes & she said to the caller (also a woman) I have to go I have someone in. The woman on the phone whom I could hear clearly said "ooooh who's in" as I looked at my new friend she looked as though she was stuck for words what to say so she said "I have a former pupil here I'm looking at a document for them" & the call ended soon after.
I felt rather upset as I thought I was her friend as wee seem to have what I thought was a bond after all I was in her home having a cup of tea & none of her other former pupils visit for afternoon/evening tea, so I felt awkward so I left I couldn't find words to speak to her because everything I was gonna talk to her about just went blank, later that night I txt her to say I was sorry I didn't speak much to her, so she told me to come another time, I spoke with her on the phone the next night as well as I was still paranoid about my quick exit as I do have anxiety problems & I told her I don't want to feel as though in bothering her and she said " I want you to come I take you for who you are" she has also said that she is in my life when I last went to visit her.
When I'm leaving hers to go home I give her a hug, at first she was hesitant, as was I, I wasn't sure if it was appropriate but now she willingly puts her arms out to be hugged but the last time though I found myself holding her a second longer I felt as though I didn't want to let her go & I kinda rested my head on her neck, I do have feelings for her I think the world of her but I'm unsure of how she thinks of me because of the whole "former pupil" thing when she was reffering to me to the woman on the phone the other week there, she never texts me first or calls me and she has also stopped putting kisses at the end of her txts when she does message, I'm unsure if she is a lesbian or bisexual, she knows I like women and it didn't bother her she was totally cool with it, I'm scared to tell her I like her in that way because I don't want to lose her as a friend, she is not married has no kids & lives alone, much needed advice thanks