Technically speaking as things went so far she should be les but how not? she is the uninformed and insecure type (probably she will fear to confess [insert rejection and "gross, disgusting" here], the other girl starts dating X or MC starts dating Y and later they separate some time, later they both get together and even confess "bcz I love you and I can't be without him" cliche trope phrase...
She could be bi too from that little scene when she got embarrassed from touching the other guy (though that would be real fucked up, if you can be bi because you are confused who you like then GG)...
As I said, she should like the girl...why?
She helped her a lot of times
Being dependable, she gives her courage and and all that emotions that other ppl can't give her
She is the one person that will always be there for her...also almost sure MC is attracted to the other girl...just that she is too dumb to notice
The scene with the guy IMO is just her being confused as she didn't have too much contact with another guy and anyway that type of situations for some dumb reasons make you think bcz your heartrate accelerated you fell in love...
So far I like it...they handled good enough both him bullying, how it feels to get bullied and the difficulties and the "I want to change to a better person"thing...