Search Results: boyfriend is acting odd

So I am a girl and I have a friend nearly 20 years older. We have become close recently. I am bisexual and her behaviour confuses me a bit. I don't want to get mixed messages but because we are new friends, I kinda don't want to ask outright just yet about whether she is attracted/keen on me. She doesn't know I'm bi by the way. She is a big Christian too. The thing is, over the last week she has been acting distant. I posted a pic of my ex-boyfriend (who she doesn't even know about) in my Whatsapp status, she saw it and then suddenly I couldn't see her Whatsapp profile pic within 30 minutes of doing that.

Anyhoo, basically
1) I have caught her just staring at me, for no reason.
2) We were standing next to each other to get a group picture and I held her hand above my shoulder and she took it away and put it tightly around my waist (don't know if that is a good or bad thing). When I turned to her to say something, she was a bit flustered and red in the face.
3) When I speak to her, she watches my mouth sometimes and looks at my chest. I find this odd considering I'm sitting right next to her and watch her do it. 4) She checks my WhatsApp statuses quite often. 5) I told her my friends are the only people who get my jokes and she got upset and said, "what about me? I laugh at you all the time."

People tell me that she "really likes me as a best friend", but if thats true, why is she weird towards me?
She once admitted that she's jealous of me.

Is she trying to 'use' me or something? She tries quite hard to befriend my friends, who she doesn't know very well. And she tells me all these stories of people who she was friends with and how they treated her badly... more like she's the one being weird towards them. So basically, she doesn't have many friends, and i can kinda see why.

She's acting hot and cold towards me, but is really friendly towards other people infront of me!!
She's been acting even weirder lately, she would walk past me, staring at me weirdly, and doesn't even say hi to me. She doesn't seem happy to see me, but yet, she still calls me her "best friend" when she's talking about me to others.

But whenever she does speak to me, She's always wanting to make plans with me and spend time with me (whilst acting weird and moody around me). So she's always trying to make plans, but is always moody towards me, whilst being nicer towards other people.

What doesn't help is that her boyfriend is sometimes flirty towards me (i don't like him that way, and i tell him to stop!!)
Her boyfriend is muslim and she's white, but she tries to be a muslim (dying her hair black and wearing fake tan, changing her accent! 😂 just to fit in with them) which i find odd!