Always feel like my bf is putting me down

Idk what is wrong with me sometimes but when me and my bf have a conversation about a subject it ends up me arguing with him or we saying who’s right and who’s not, it’s like I can’t just talk about something and feel like he’s either getting onto me or making me feel like I’m in the wrong ?? What do I do man🤣?! It’s jus so annoying I’m 19 aswell and he’s 21