Should I (17F) go after my Ex-best friends crush who liked her back but he (17M) barely does anymore?

r/

(sorry for any spelling mistakes if there is any and sorry for such a long story! If anyone has any questions I can further elaborate)

Chair (nickname for him): 17 male
Me: 17 female
So I knew this guy the whole year (I’ll call him I don’t know Chair I guess) I’m a junior in high school female and I sit next to this guy in orchestra. We laugh all the time between songs, joke, text, and flirt sometimes (more me then him) and my best friend one day told me she liked him. I tried to set them up but they fell out them she liked him again (whole situation I can go into if people want). But when they weren’t talking I asked her if I could go after him because I might like him. She said yes but when she told me she liked him again I told myself I wouldn’t like him at all costs. Now over these past few weeks they’ve been in this kinda situationship where they only text and don’t talk in class. And me and her got in a fight a few weeks ago over guess what Chair! Because all my friends ship me and Chair and I guess I’m to close for him (even though they aren’t dating and only talk on Snapchat when she complains!) the other day we had a orchestra concert to which we sit next to eachother in orchestra. He were texting all after school, talking in the warmup room, talking in the audience when we had to walk another grade perform, and talking on stage (I know stupid my friend said it was pretty obvious we were talking and laughing) and we were walking back to clean up the stage after and texting after. And I realized I was smiling like a idiot the WHOLE time while texting him. And the other day after the concert in orchestra we had a free day and we just stayed together watching TikToks on Chairs phone and playing like stupid word games on mine. I don’t know if I truly do like him but I’m thinking I do. I told my friends and they said it was bad. (because he still talks to her even though we had a talk about how bad she is and he said he’d block her on the last day of school because he still has classes with him) I know she still likes him a lot but she’s been really toxic lately and he doesn’t like her anymore. So after he blocks her would it be bad if I tried to make a move on him and maybe ask to date if I do like him? Also she is a really toxic friend and has been pretty mean to friends plus him kinda lately.

Tl;DR Should I go after my ex-best friend friend’s crush who I’m still questioning if I like but my ex-best friend who is toxic still likes him and he barely likes her anymore?