Advice needed please 🙈

So my friend just got out of an almost 4 years relationship (long distance relationship)...I’m sad about and I know she’s way more sad about 😞and she’s really not in a good place..she’s been having a tough time copping..though I’m proud of her for handling the bad situation so well😢😞..ever since she got out of the relationship she’s been hanging out with another guy..our classmate..(that kinda has a bad reputation in school)..she says she’s she doesn’t like him like that but I think she does..I think there is nothing wrong with it as long as she doesn’t rush into making any decision..coz she’s clearly not over her ex..I know I’m being selfish but ..ever since we became friends..we are 98% together ..we do literally everything together..and I’m just bummed up about her now spending time with another person..I’m i a bad person for feeling bad that she’s spending time with other people other than me ....I guess I just don’t like that boy ..but I obviously want her to be happy and meet the man of her dreams.but lately it’s just been affecting our friendship and I don’t want to break our friendship because of some boy😣... how do I get over feeling sad about the situation and more happy for her because I genuinely want her to be happy 😔🙏🏽😢..