relationship advice

hey gals! so ive been with my boyfriend for a little over a year now. I’m 18, and he’s 21. hes dealt with a lot of trauma in his teen years, and hes transformed into a whole new person. i admire him so much for that. he is my best friend. im very much in love w him. we often talk about marriage, and growing old together. hes been in a lot of bad relationships, and he is my first ever boyfriend. we fight very often, bickering, dumb arguments- but they occur so frequently its tiring. we’ve been getting a lot better but still i cant help but feel drained. i love him so much and he is my bestest friend, i cant imagine a life without him. i guess i just need advice. i have a crush on this guy in one of my classes, and i cant stop myself from thinking about what itd be like if we werent together. could there be someone out there better? i feel so horrible just saying that, but im 18, a freshman in college, and im already thinking about settling down with him? i feel like im in this circle trapped. we fight, we makeup, we’re in the stars so so happy, then back to fighting. i cannot imagine my life without him, but i kind of want to? i dont know what to do. i dont want to breakup but i want to have that freedom to experience different people, and relationships i guess? anyways, the point is me asking what you would do in my situation, advice, or anything youve gone through similar to this? ugh this feels good to right. i have no one to talk to about this stuff. thanks for reading if you got this far!