focus more on yourself!! allow yourself to feel those emotions, even though it's an awful feeling. if you want to cry, then cry. let it all out!!! then after that, treat yourself with a nice food or a good movie/book. you got this!!! (⁠⊃⁠｡⁠•́⁠‿⁠•̀⁠｡⁠)⁠⊃

yea clinging to someone for coping would hurt both you and the new person,,,so yea just as the person before me suggested its better to focus on yourself instead of him cause again your world doesnt revolve around him...me and my ex are in the same uni so when i see him randomly it hurts but i try to ignore him, so when you go on a vacation maybe try avoiding interactions as much as possible otherwise u might get hurt, but again social situation so you don't know when you might need to interact with him, at that time just keep the interaction as minimal as possible cause the more you talk the more you might wanna cling to him(saying this from my perspective, it can be different for you)...just try to enjoy your vacation,,eat things that you like maybe chocolates, buy yourself little gifts,,listen to songs that you like..just try to forget..as first it maybe be hurt but at some point you will move on..best of luck!

honestly from past breakups, the best advice i can give is to show yourself a lot of love. eat food that makes you feel good, blast your favorite music and really focus on self care. loving yourself and giving yourself the grace to grieve and heal inside and out is the best way to build that confidence and positive outlook. you got this! it’ll be up and down but i believe in you :-)