u/Economy_Row_7087

| (30 f) started dating a man (33) almost a year ago. We hit it off right away.
We both agreed that we wanted to date for at least a year before engagement, but we wanted to move quickly after since we want children.
Everything has gone perfect so far, but we're nearing the 11 month mark and the past month or two he started slowly showing signs of insecurity. He's very logical. He's an engineer, he overthinks everything, he reads a lot, he's slow to anger.. all good things that I love about him, but now I feel like he's overthinking the thought of who he's going to marry.
I keep telling him not everything in life is an equation with a right and wrong answer. He's also going through a job change and it's stressing him out. He says marriage is the most important decision in his life, and he loves me and the life we could build together, but he just doesn't know 100%, and the timeline approaching a year is making him so nervous.
Last night he told me he loses sleep over it and sometimes he thinks so much about it he gets stomach aches... this is concerning to me. He assures me he loves me and doesn't want to break up, but I don't know how to feel since I'm madly in love with him. I feel like he should be a little bit less nervous approaching a year mark. He says as a man the decision is more complex, he'd be the provider, etc. Is this my sign to leave or is this normal for men before proposing?