Help me I don’t know what to do!

So I’ve been with my boyfriend 6 months and I love him a lot. Recently, however, we have argued near enough constantly and it’s getting too much. This year is a vital year as it’s my last year of A-Levels and arguing is the last think I need. A few days ago a boy messaged me who I had feelings for before, but he hadn’t wanted a relationship as he’d just got out of one. However now it appears he does like me and I do miss him a lot. I’m stuck on what to do because I love my partner but this guy treated me better. Help please! No rude comments I just need advice😊