Car seat safety- help me out! 🤨

I have a 2015 Honda Accord and one car seat (Graco 4 ever). I do not have latches to use the latch system in the middle, which I know is the safest place for the car seat. I have used the seat belt in the middle but I don’t feel like the seat is secure enough that way. No matter how much I tighten it, the seat still slides because of the hump in the middle. I like the way the seat sits securely using the latch system on the side seat. However, I’m worried about having my baby on the side in such a small car. What are yalls experiences? I’m about to just go buy an SUV. 😫