Trouble in bed

My husband and I have been married for about 5 months now and he’s the most lovable person ever he cares about me, he’s always sweet and does everything that I ask for always telling me I’m cute and how much he loves me however, he haven’t tried to touch me or have sex with me for 3 weeks now. Now I know it might sound silly. But our whole relationship before getting married was always long distance and we used to have sex quite often, he was always really into it and experimenting new things. But in the last couple of months I have seen that we have only had sex because we tried conceiving *which I’m not pregnant yet* but every time we do it it’s because I tell him or remind him about it. I’ve even thrown myself at him a couple times and he just says “I’m tired from working” which I do understand but he always says that but still have energy to play his game for a couple hours before bed? I have even brought it up to his attention and all he says it’s that his tired so I stopped talking about because he would get hostile at some points but now I don’t know what to do or think. Like it’s this normal?