Do I suck??

I’m a white belt, stated about 2 months ago. I told my friend and suggested she should join. She did. We both love it, but I’m noticing it’s hard for me to get to summit when we actually roll. Im aware that 2 months isn’t much of an advantage but I’m confused still lol. She is slightly heavier and taller than me, maybe 10-15lb? But why am I struggling so much. She does do a little to much when we roll but it’s my fault for not doing just as much ig.

So tell me, what is it. Am I just bad even though I’m slightly more experienced?? Or does 10lb make real difference? And for some reason I don’t enjoy rolling with her as much as I do with others.