"On top" sex problems ๐Ÿ˜Ÿ

Jordi
So my boyfriend and I have been together for almost 4 years. I'm still having trouble having sex being "on top".. (Mind you he took my virginity) Now when I ask to try he doesn't want to. Is that ok? I've look at sex positions and and seen some videos, but I jus can't get it down. Help?