i kinda think the way you're phrasing it is offputting "hey can i come over today, well i mean if you want to, its ok if you dont want me to", seems just really .. well, hard to explain it, dramatic, or... idk, wishy washy, like you're really scared of what his response to me, if i was the guy, i would just be confused, think you're scared of asking me about something.. and the post- asking, explaining why he shouldnt feel guilty either way is too much if he's an introvert, he could like you just fine, but not into saying too many words

best way to approach me "hey can i come over" (no "but its okay if you dont want me to, i perfectly understand either way, it won't hurt my feelings at all" sort of deal, it really just puts more pressure on it) wait an hour, if he doesnt respond (and he's at his phone or w/e), he might not want to come over, or just isnt ready to respond right away anyway, i would wait an hour, then say something like "ah, nevermind, gotta do something now anyway/go somewhere now anyway", and that way you dont have to worry about appearing to pressure him into something (which you seem to fear alot from those texts)

another few things that might work if you happen to have started a conversation with him, and he's responding to it, then ask him "hey, can i come over", might put him in a mood more willing to do something like that, and if he has been responding regularly, he cant act like he's just not there, or he hasnt checked his phone or something (even if he does act like that, it might just be a way to putting off feeling guilty about saying "no", doesnt mean he's pissed or anything) if he likes videogames (on steam), help yourself into a game with him, don't pressure him into playing anything, don't say anything, just join a game and try to enjoy it with him for a while, talk a little bit about it, then ask afterwards if he wants to do something

ALSO< fresetu's comment "Ask him directly "Did I pressure you into seeing me? / Did you feel pressured to see me?""... don't do that, seriously, don't go bringing up old stuff, just let it be forgotten, don't force that sort of conversation onto him, i dont think an extrovert would even enjoy answering that sort of thing, just comes off sort of angry/pedantic if you ask me