I can understand you must be hurt, try to make yourself realise that the feeling has to be mutual, we cannot make someone love us forcefully because we have feelings for them.
It’s okay for someone to not reciprocate the same way we want them to.
Try to accept it and start focusing on yourself.
Hey its okay! I get that unloving a person is not easy! Maybe focus all that love into something else! Like a pet or maybe your passion, make an art piece or music! Expressing yourself through creative things might help