I was like 'OMG they still so cute',until the plot twist bc of the last line ×_× why

Actually I think he didn't mean it in a wrong way. Like the word 'stuck' is like two becoming a one together. A couple

yes i think so too. I think he meant it as "I want u to be with me forever," or like "i am not going to let anything or anyone harm u or take u away"