Young Couples with partners with Autism ... Any advice??

hello everyone, 

I am 20 years old and i am currently with my partner (aged 19) of 2years who has Autism..

We are at bad time in our relationship and i believe it's in the lack of communication we have, its very difficult for me to try and communicate in a way where I can make him understand.. I've never experienced being in a relationship with someone who suffers from autism, and with my age I have very little experience and I am finding it all very stressful and difficult to understand how it works..

does anyone have a tips or ideas that may help me? :) 

thanks!