Help please!

Hi, not exactly sure what I’ve done to my pattern but I was on a knit row and noticed that when I knitted a loop instead of 2 loops of yarn on my needle there was three then I think I dropped a stitch to fix it?

My boyfriend tried to fix it and now it looks like this:

To me, the easiest way to figure this out is to pinch the stitch below and take the needle out of the missed stitch. Pinching will ensure that the stitch doesn’t drop down and ladder. Then you may be able to see where the yarn strand was missed. It may take letting the stitch drop down another row to fix but that should work. Basically you’re doing this to repair your very pretty garter stitch:

Will try that thank you!