Hi 21M, doing my undergraduate in a conservative indian state started reading trp 8 months ago.Recently i have been getting ioi's from a particular girl or atleast i think,. She tries to start conversations with me often and it's all smiles whenever there is eye contact. I used to have a minor oneitis to her and she knew about it and this is before trp i felt that something could have come out of it back then. So i asked her if she liked me and she said no. I left it there and friend zoned myself and forgot about her. Fast forward i start reading trp and would avoid her politely because I wasn't interested in friendship. I began focusing on myself(monk mode 2 months) started bodyweight exercises. I spent time learning about new topics and became more social with my guy friends, although i wouldn't talk to girls at the time,because i wasn't interested .Eventually i got bored and started talking to every girl around me but i would only go back to the ones that help me with my work etc.I also started cold approaching random girls . Recently i realized I would look at my ex-oneitis unconsciously so i started to force myself to ignore her. Although she would try to start conversations with me before this it has now significantly increased .
I have a feeling she is using me as a validation tool because it reminds of the last time i tried .Her friends would try to hook us up and i usually never have serious conversations. It's usually me fucking around being sarcastic etc and nothing comes out of it. She eventually loses interest and i try to make something out it .It fails i don't give a fuck and she gets interested again. The truth is i used to think i have abundance but i don't i am just good at numbing myself to this shit till i forget about it. Also I want work on myself but i can't with this thought in my head. " What if I am missing out on something here" but also" What if she is using me for validation and wasting my time". Honestly i try to ignore her and focus on myself but she gets me sometimes.

Tdlr: Been getting minor ioi's on and of from a girl feels like i am wasting my time maybe have a oneitis need advice on what to do moving forward.

Edit: I want to make it clear i have not been in a relationship with her.Its been around 1 yrs since I tried. I haven't escalated with her except occasional sexual reference only verbal. Although she would stand very close to me and the first time she did that (might sound cringy) she was trembling.