Will this make sex difficult for us?

my bf is 6`4 im 5`8 how is that ganna work sexually? lol all my bfs were like 5`10 not almost a foot taller than me! is it ganna be akward? his last gf was 5`2 and he said it didnt work having sex with her, something like that,, well ya i could only imagine how akward it was,, do you think itll be like that with me too?