He lied to me 😔 I don’t know what to do

I’ve been dating my boyfriend for almost 3 months and I’m already crazy about him. I pictured him being the person I want to spend the rest of my life with. Yesterday he told me that there’s something he wants to tell me but it has to be face to face. Being me, I told him I can’t wait a month (because he’s out of the country) that he should tell me immediately. But he said he’s so embarrassed and he’ll message me in the morning. My mind started going on overdrive; could he be sick, is he dying, did he cheat on me?

I mean I was going crazy, I couldn’t even sleep because that was on my mind. But this morning, he messaged me and this was it.

So turns out he is 20 and he told me that he was 24. I don’t mind his age. I’ve dated guys younger, the fact that he lied to me is what hurt me. If he lied about his age, what else could he be hiding from me. I haven’t replied him yet because I don’t know what to do. Please help me 😭

UPDATE: Thank you guys for your advice. I love him and although it hurt that he lied to me, I have chosen to forgive him. This is the message I sent and his response.