Q: Why do I feel like I regret being in my relationship?

Because you have given up something to be there, whether your freedom, time with your friends, family, hobbies, religion, etc.

What you want to do is look to see if you actually negotiated any of this, or just did it because you thought you had to, or if he demanded it.

You should make a list of the things that are important to you (including future kids, relationship to money, religion, whose family to spend the holidays with), that fill your soul, that give you meaning in the world, that worry you, that make you sad, etc.

Then you should ask yourself if you can even share these with him, or if you would to make the relationship work. If you can't do that (to most of it anyway), you're still wearing a mask and the relationship has barely begun.

If you can, then start talking to him about the things you need to structure back in to make it work, and figure out how to honor yourself while you honor the relationship.

And if he can't or won't, or makes what you think is important small, then get out and find someone who is more willing to partner with you.