Found out my Fiancé has been cheating on me

So I’ve been getting red flags nonstop but tried to ignore them thinking I’m overthinking things . Well he left his phone at home mistakenly and I went in it . Not only is he on tinder but he’s had segg with multiple women and took one with him to his job interview that’s out of state. I packed up some stuff and left . I’m so heart broken . And I sent him the picture of him and the woman when I left and he didn’t even text nor call . I think that’s the part that hurts the worst ! He didn’t even care to explain anything . He just went about his day like nothing happened . All of my things are at his house and I don’t even want to see him again . Like why did he even propose to me just to cheat on me ? I do everything for that man but clearly everything isn’t enough . Oh he even had jewelry delivered to the house for one of them . My birthday is 8 days away and he lied and said it was for me but I saw the necklace on the girl in the picture they took.