I just lost my first love and I don’t care

Last night me(18M) and my now ex girlfriend (17F) broke up she was my first relationship and I’m unsure if I should be more upset but instead I feel free like I’m not walking on eggshells every time I try talk to her the break up was bad and so I think that’s why I don’t really care I think I’ve known this was coming for a few weeks now so I think I’ve grieved my relationship before it was over she was getting distant for a while and it was like even though we were together I felt alone we argued all this morning and she told me I was a piece of shit and to kms so that killed all the care and love I had left to give which also led to me blocking her