You have said that your boyfriend does not want a serious relationship with you.
You have said this is because he has concerns about your maturity and mental capacity.
Now you have said he loves you.
These things contradict each other. That means they cannot all be true at the same time.
Or it means he is happy to be with you for now but will not want to be with you long term or to start a family with you.
If he wants children, he will find someone who he feels is capable of being a life partner and a parent with.
What makes you think it will be serious soon?
I know you have said repeatedly that you don't see what is wrong with being with a typical man but this is the problem.
Some people have found your responses frustrating on here.
Some people are simplifying their language and their sentences so that you understand.
Everyone is repeating the same answers to your questions because you keep asking the same questions.
Everyone can see from your posts that you are not as capable as you think you are.
Everyone can see that you don't understand but that you can't see that.
And, sadly, everyone can see that you are trying to show that you understand and that you think you understand.
Most people want to be in a relationship with someone of a similar level of intelligence to themselves. To be able to have conversations on a similar level. And to talk to someone who fully understands what they are saying.
Without that, people become frustrated. When people become frustrated they lose respect and don't see their partner as an equal.
You deserve to be with someone who thinks you are amazing. Not someone who is frustrated by you or who isn't serious about you because of your difficulties.