OP, listen to your gut.
You got pregnant very quickly and decided to go ahead with it.
You skipped many steps in the "normal" run of things.
Unfortunately for many men this dissolves any desire to marry.
They see no value in it for THEM.
My advice to you is to sort out your contraception.
Do NOT have a second child with him while you feel he doesn't share your vision.
3 or 4 years away is I don't want to marry any time soon in man speak.
However, you are not together long at all so his reticence is not surprising.
See how the relationship goes but do NOT have a second child.
I would say to any woman who really wants to be married BEFORE having children, it is madness to just hope it will happen and go ahead with a pregnancy.
There is nothing wrong for wanting to follow tradition.
Likewise if a woman doesn't wish to marry, fine too.
But going on and having multiple children when he has been marriage shy after one child, strikes me as madness.
Women by far make the greatest sacrifices with their body, career, salary, pension, housing etc.
It is foolish not to acknowledge this.
Therefore it is very reasonable that they be proactive in protecting themselves.
He is entitled to not wish to marry if he doesn't want to, but if that is the case you really need to protect yourself.
One of the most STUPID things I read and hear is that marriage is a bigger commitment than having children.
NOTHING is as big a commitment to another person than having a child together.....particularly for a woman.
For men they say that marriage is a greater commitment simply because of money, and not being able to walk away as easily and having to share assets.
But for women the moment you have a child, you are ultimately at the mercy of the sincerity of your partner.
That is why being financially secure and independent if he has zero wish to marry you is so important, but it is also importsnt when you marry.
CMS can be paltry and when relationships fall apart women are ultimately left at the mercy of if the father wishes to be fully involved or a BMD (bare minimum dad).
If they don't wish to be hugely involved they can choose to pay paltry CM and feck off and continue on with their lives untroubled.
Mothers are left to carry the burden of providing a home, education, food whilst juggling childcare if they try to work.
So tough.
That's why IMO humble opinion, going ahead with a pregnancy with a man you barely know is complete madness and that is what I would communicate to my daughters in such a position.
Protect yourself OP, no one else will.