<human>: Can you condense the text into three sentences or less?

I've been friend with that guy for 4 years now. 2 years ago he met that girl, had a crush but didn't say a word. More than a later he told her he had feelings. She basically said they were only friends. 

A few months after this i met the girl and we started going out together. When things started being serious I asked my friend if he was OK with our relationship, he said yes. 

More than a month after asking him, he's still making "jokes" about me having her and not him and he's sometimes aggressive. Do you think it is ok for me to be with her ? Is there anything i should do ?
<bot>: a friend of mine had a crush on my girlfriend when i didn't know her. I feel like it's not past for him even if i asked him and he said it was.