Finding it hard to commit/trust

I’ve been a single mom for 5 years. Ex-fiancé left after I told him I was pregnant and I’ve been on my own since other than for-fun short-term relationships. I decided I was ready to date for real, went out with the first guy I clicked with on the dating app, and liked him. A month and 2 days from our first date and I found out I was pregnant again. I’m now 6 weeks.

He’s been amazing. He wants to be there for me, our baby, and my daughter from my prior relationship. He’s been super supportive emotionally and in dealing with my physical symptoms. I still really like him and could honestly see a future with him.

And that’s what scares me. I’ve been alone so long it’s been a big adjustment letting him help with the pregnancy and do things for me and my kid. It’s really nice having someone but I can’t help but be afraid to rely on him and trust him in case he leaves too. I’ve talked to him about these feelings and he was super understanding and said that he’s in it for the long-haul and he hopes he’ll be able to earn my trust as he keeps being there and supportive.

I want to trust him that he won’t leave but it’s hard.