You keep saying it’s ‘OK’, but I’d really urge you to think about the feelings and instincts that prompted you to post, OP.
Check in on the support threads for partners of people (largely men) with ASD. Or look up the term Cassandra syndrome.
See whether you are really happy signing up to a future with someone whose sole response if you were to receive a cancer diagnosis, for example, might be irritation, or anxiety about how they themselves will be affected and inconvenienced if you are not able to keep doing what you do for them.
See if you are really OK with a partner who never wants to do things together, is rude to your friends and family, and just cannot make himself listen, let alone care, if you tell him about something important that’s going on in your life.
Think about whether you are OK to have your life rigidly restricted by another person’s anxiety or need for control or lack of initiative or inability to collaborate or compromise. If you’re happy going through life apologising for him when he’s upset people. If you’re OK walking on eggshells around someone with no ability to rise above a transient bad mood in order to be even minimally polite and civil.
This is not depression or burnout or something wrong that will pass - this is who he is, and the more he settles into your relationship the more evident it will become. It doesn’t make him a bad person, but it does make him someone with a social disability that limits his ability to function as a genuine partner in life.
Convincing yourself this is all stuff you’re OK with in an intimate relationship (where you need to trust someone to care about your happiness and take your needs and desires into consideration) can set you up for a lifetime of erasing yourself to nothing. To accommodate a partner who doesn’t miss you when you go away, and who might very well feel relieved if you were to die tomorrow because he experiences your desire for a bit of interaction & connection as intolerably intrusive and pressuring.
When your partner doesn’t have the ability to recognise you as a person who matters in your own right, you begin to feel that you are subhuman. As it becomes more and more difficult, practically and financially, to leave, you find no longer have the belief in yourself to take the risk. Over time your partner has convinced you that anything that might bring you happiness and contentment and a feeling of connection is a pointless and superficial waste of time, and a massive imposition on others. That it’s unrealistic to expect anything more from life. So there seems little point in trying to get out.
Take your own feelings and reservations seriously while you still can.