Ex is everything

[Helhelpme]

Not sure what if I'm reading to much into this.AiBU to feel a bit weird that his ex asked him to go to festivals and on holiday without me ? I see him today but he said had hard week, hadn't told me but he had homemade food in the fridge from his ex.. They have grown child together me split 20 years ago ? Like I basically need to know I'm not crazy thinking this feels shit. I feel like an are writing this . Just need to understand

Instead of asking here, you need to speak to him. If you're uncomfortable with his closeness to his ex, you need to tell him. It might be that they are still close friends. Then it's for you to decide if you want to stay in a relationship with him or not.