iwtl how to know someone is interested in you?

I genuinely thought this of friendship but people tell me otherwise ( and recently I got feelings for my friend which I am not proud of, I intended this as friendship but it didn't stay).

We get along pretty well, yesterday she was complaining about her neck pain. I said to her massage yourself, she said I can't, I said If I can you can also. Then she said then massage me I was massaging her neck which I found odd that she asked me to do it.

I asked her to we go for coffee and she agreed to it. Today we went for coffee and there were three chairs, I sat on the right she sat in the middle and we put stuff in the middle. Then she said she can't hear me (but I was speaking very loudly 💀) then moved closer to me by sitting in the middle chair and moving stuff. She was laughing at a lot of my stupid jokes and some very perverted ( which I didn't intentionally mean but it came off that way)

I tried putting my hands on her arm cuz I am very touchy with my friends but not at all with strangers and she didn't mind it.

I find this a friendly hangout but I see people saying here on Reddit it's date, like jeez guys.