Sex with Husband

Hello, everyone ..

my husband & I have been together for almost 5 years & have been married for 3 months .. we’ve been living together for 3 years .. ever since we’ve basically lived together I literally have to beg him for sex .. his excuse to why he doesn’t wanna have sex is because he’s tired & he’s old . He’s only 22. 🙄 my question is , what can I do to get him to have sex with me? I feel like I’ve tried everything ..