Can you help me see into this friendship/thing?

Hi, I have known this guy since last year. We do not chat on a regular basis, but when we do, I feel we have known each other for a while. He is a bit stupid but I think i like him. He has told me a few times 'Ich habe dich lieb' , anything like that is like friendly. He likes to joke with me, and recently told me we have to meet in person. We have talked very briefly about it before as he asked me when i come visit him. However, we don't write too often and we don't write for a long time, because he will either write  stuff and then say good night. I don't know until when this will go. He said he will write me a letter and i said ok, but you won't be able to send me because of lockdown, we are in different countries. He said he will try it. but last week he said he hates administration. i think he is playing a bit. so i want to have fun too with him, but this time sexually, although WE HAVE NEVER SPOKEN ABOUT 'IT', which is strange right? I don't know what to do with this guy. Either i tell him listen fvck off, or continue to write him and we meet sometime. What do you think?