<human>: Condense the text into a few key points

My SO and I have been together for awhile even though we are not technically dating. He's leaving really soon to go back home and I'm stuck where we currently live. It's been about 2months since we've done anything more intimate than cuddling and platonic kissing (which we do every weekend and throughout the week occasionally). Any time I try to initiate something more I feel like I am being brushed off gently. 

I miss connecting with him on a physical level. Sex, while not the most important part of a relationship, is still very important to me. I almost feel like he's trying to pull away before he leaves or maybe he just isn't attracted to me anymore. 

I know I need to discuss this with him but I don't know how to start the conversation without sounding like I am criticizing him or coming off as pushy. I don't want him to have sex with me just because I'm asking for it but I'm so sick of being the platonic cuddle buddy.
<bot>: I want to have sex with my SO more frequently but I don't know how to bring it up. We're going to dinner tonight and I wanted to bring it up then, any advice would be greatly appreciated.