I think that’s your problem, if they’re all you’ve got it’s a huge pressure on this relationship to be everything to you.
I also suffer from anxiety but found that it improved no end when I split with my partner recently and had to make more of a life for myself alone. I rejoined clubs, started new hobbies, spent more time with friends and family and read a lot to help me to pin down what is important to me.
DP and I have since got back together and the relationship is so much better for having a bit more going on outside of it.
I think you sound a bit too dependent on him for your happiness and would benefit from expanding your circle a bit and by trying to provide some of that love and comfort for yourself. You’re so young and have a lot of life to live, don’t do it entirely through someone else. Find out what makes YOU happy, what drives you and interests you outside of the relationship.
Once you realise that you don’t need him, you can manage without him, but he is a welcome addition to your life, you will find it feels freeing and calming. The anxiety of trying to control someone else so that they can provide what you need is exhausting. I know, I tried. Now that I have stepped back a bit, I can enjoy my time with DP and also enjoy my time without him.
You may find that you enjoy your time more without him and that at some point in the future the relationship ends. That’s ok. It’s not what any of us plan, but especially having a baby at such a young age, it’s a long shot that this is the perfect man for you to spend your whole life with. As long as you both parent and interact with each other respectfully separating is not the worst thing that can happen.
Just take the pressure off yourself - relationships take work, but they shouldn’t BE hard work.