it's long but worth the read please upvote i want as much advice as possible xxx

ok so i've been dating my boyfriend for 4 months it's pretty serious already, he was my first but i'm like his 22nd 😕 anyways we are in a fully committed relationship and i know he loves me and i love him and he treats me really well BUT he has this ex that he used to be on and off with for ages. when we started dating all i would hear about is (let's call her kate not real name) kate i kinda ignored it tho. anyways we start dating and i find out he texts her all the time and he's still continuously talking about her, he tells me that they are still good friends. it bothers me but like what can ya do. anyways.... we live in a country town and travelled up to the main city (where 'kate' lives) because he's flying out of the state for work, we had an amazing night in the city and on the ride back i noticed him texting her later on he tells me when he flys back in he's gonna meet up with her. immediately i went silent and got very pissed off later on he tells me that i can come if i want like cunt really if i want! now in 2 weeks i'm meeting his ex girlfriend with him for lunch somewhere, he also took one of his other girlfriends to meet her once and they ended up breaking up!! is it weird to have s relationship like this with his ex should i be worried? has similar things happened to you girls?

i'll update this as it goes and tell you guys how the lunch goes if you want