Loyal to my ex

I dated my ex for 8 years. After 3 years of being broken up weve started talking again and we've had sex at times. We've agreed to a friends with benefits relationship. We also hang out every weekend (doing non sexual things). He's a sweetie and I know he wants more. But I'm not sure I want to get back together with him. We don't always get a long. He's also 26 going on 27, a high school drop out, with no financial stability, and he also doesn't drive or have a car. As much as it hurts me to say this he's somewhat of a "loser". I've recently met another guy, who I think I also like. This guy has a good job, and though I'm still getting to know him, I really like him already (we're not dating yet tho). But I feel like my heart is still loyal to my ex. My ex is the only man I've been with sexually and I'm afraid to give that part of me to someone else. Terrified. Idk how or when to tell my ex about this new guy. I don't want to hurt his feelings. Idk if I'll even date the new guy.  I'm honestly confused. Confused bc idk if i have feelings for my ex or not. I've only ever dated him and idk what other guys are like. I want to explore my options, but idk if emotionally I will be able to. I feel like I am my ex's only.