Breakup

Hi guys! I've been with this guy for like a year now but in the past few months we've been fighting really often. At first I felt like he was the perfect match for me, it seemed like we had the same interests and the same ideals, but lately I started questioning that. I know I love him, but deep down I feel like it's better if we broke up. I am terrified of being alone again because I feel like I'm not that close to anyone, maybe except for my mom. I don't know if I should keep trying to improve my relationship with my boyfriend or start to get used to the idea that I will be alone for a while again even though that might be better in the long run. Any advice?