Should I end my relationship?

For the past month or so I’ve been questioning whether or not I should be staying in my relationship.

I have posted on here a few times asking for advice on my boyfriend as he never messaged me anymore or bothered to make time for me… but these last couple of month since we graduated high school it has gotten worse. Even when we do see each other and I try to be affectionate he brushes me off, when he does message me it’s mostly in a group chat I have with him and my best friend, which around the middle of last year I was feeling like something was going on between them, she blatantly denied it and I believe her but sometimes I’m not sure about him… I know he loves me and has and would never cheat on me but it just feels like he’s so emotionally distant with me and whenever there’s something wrong with her he seems to have a lot of empathy for her and not me when I have issues… I know it’s stupid but idk. I was having a late night chat with my parents one night while having drinks (in my country the legal drinking age is 18) and they said they don’t think it will last, neither does one of my other best friends… I also tried talking about this with my best friend that’s in the group chat with us and she said she thinks that could be acting this way cause we suspect there’s something going on with him at home and he seems to be treating everyone like an asshole lately. But I think he tends to go through phases with it, which is fine we all have our bad days but this is just different, it’s like months in end he’ll just treat everyone around him in an asshole type way.

I’m sorry I probably sound a bit immature but I feel like lately I’ve been doing some growing and reflecting on my high school friendships and relationship and trying to work out if they’re good for me in the long run…

Please help me