need advice f21 in a relationship with 30m?

my boyfriend and i have been dating for almost 11 months. we live together and he’s currently at a 16 week school where he’s only home for the weekends. i feel it has been getting to me and raising more concern on issues i had previously before him leaving. concern number 1- he hasn’t said i love you to me. now i understand this varies person to person and he has been married before so i just need thoughts on this. i haven’t said it either just out of fear of rejection but deep down i know we both do, at least i hope he does. concern number 2- our sex life kind of sucks. he never wants to be intimate with me. his excuses have been that he’s insecure or intimidated. i have had numerous partners/ experience and he has only had a handful. he thinks i have an upper hand and gets scared by that. so he says i guess. we have had this conversation numerous NUMEROUS times how he isn’t pleasing me and meeting my expectations when it comes to intimacy. nothing has changed. we have sex maybe once or twice a month. i’ve become exceedingly more frustrated by this especially now that he’s gone a week at a time. concern number 3- he seems emotionally unavailable. he never wants to talk when i bring up an issue and just lets me have the floor. no inputs, just questions like “what am i doing?” “be more specific” things like that. it pisses me off. let’s work out an agreement not just say you’re going to fix it when we both know you’re lying. i feel like asking/ begging for these things is unfair, especially when i get it it feels fake. other than those and a few other normal relationship issues he is my dream guy. i struggle heavily with mental health and he has always kept a level head for me and honestly made it extremely manageable to the point i’m off medication now. i just want other inputs, my friends wont understand and my therapist doesn’t really help either honestly.