Hi Jessii

First of all, congrats for recognizing the problem.
Second of all, I want to ask if you have had a toxic relationship / cheating bf(s) in the past?
Third of all, what is your attachment style?

Your feelings are valid. And it is OK to feel this way and worry about your partner. I'm sure he has those feelings at times. We all have insecure, vulnerable moments in relationships.

It's half the battle, acknowledging that you may have some trust issues.
Especially when you've had past traumatic memories where you felt like you couldn't trust your exes and been cheated on... You can easily project those feelings onto your current relationship.
You may also have an anxious attachment style. (You can take the quiz here: Attachment Style Quiz: Free & Fast Attachment Style Test)

Work on yourself.
If you keep having issues, you could possibly discuss this with your partner and let him know you may like a little extra reassurance and affirmation. People feel affection in different ways; it's OK to let them know how you like to receive love.

Also... Remember that it isn't about trusting that they won't break your heart.
It's about trusting yourself that you chose the right person, and that even if he breaks your heart you can pick up the pieces yourself because YOU are a strong person.

Good luck!

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[EDITED]

I just read your other post.
Are you experiencing any symptoms of postpartum depression by any chance?

When the partner doesn't seem to put much effort, or as much effort into the relationship as you, it is stressful.. Because you want them to just do and say loving things without you having to ask. & With the newborn baby, and money issues, no friends close nearby... I'm sure it's even harder.

The only thing I can say is that maybe stop just giving your all. Focus on yourself, and leave some space between you and your partner. See if HE fills the void if you don't. As women we give and give and sometimes men can feel smothered. This makes them pull away even more.

Don't feel anxious or desperate (I know it's easier said than done), because you have nothing to lose. If he doesn't fill the distance, you don't want someone like that and that'll give you clarity and courage to leave. If he does, then great, you've mastered the art of getting your power back.

My heart goes out to you.

x