Can you still love someone after being broken up for 5 years and in other relationships?

I still have feelings, they never went away. It’s crazy that I still love him(I’d never say it of course) we haven’t been together in about 4 years. But would see each other from time to time, and then we started hanging out, and he became my best friend. I could call on him whenever I needed him and he would come, even faster than the guys I called my “bf” back then🙄. I’ve checked his social media daily since we broken up, mind you it has been 4 years, I’m so embarrassed. I’m so insecure right now, low self esteem, dealing with depression and ect. That I’ve only seen him maybe 3 times in the past 2 years. He constantly still text me even if I don’t answer. Always ask to see me and says he wants to try again, but doesn’t understand why I’m pushing away. I just don’t want to get back together and it be for nothing. We were literally 18/19 when we dated back then. I just know when I get in relationships I lose myself, I can’t help it. I try not to and it happens. That’s why I’ve kept my distance.