TTC Relationship advice

Hey ladies, so my boyfriend and I have been together for almost 3 years and we’ve been trying to get pregnant since February and nothing has happen. In the past we used to have sex multiple times a week but now I’ve notice when we have sex he doesn’t stay hard long enough and that completely turns me off also we only have sex twice a month now. Our relationships isn’t as great as it used to be because of the simple fact that I wanna have a baby and I’m not trying to blame him but when you go from having sex at least 5 times a week to having sex twice a month obviously I’m gonna feel some type of way. I want a baby so bad but if we’re not doing it a lot then of course it’s gonna impact me emotionally. What advice do you guys have for me or us?