Finding it hard to keep my distance from non‑mahram men when I’m out alone

Assalamu Alaykum wa rahmatullahi wa barakatuh. I need some advice or maybe an explanation why I keep struggling with this. I reverted two years back. I’m in my twenties and recently got married, but I don’t live with my husband yet, and I still don’t wear hijab. I had to fly back home alone (in Europe). I got a window seat with two men next to me. During take‑off the plane shook and I got frightened and grabbed my armrest - my hand accidentally brushed the man beside me, he was around forty. He laughed and started chatting about the turbulence. I answered short and direct, trying to ignore him, but he just kept talking. Then he asked where I’m from, I told him, and without thinking I asked him the same back. That was my mistake, I don’t know why I did it. I never wanted to talk, I just wanted it to stop. But it turned into a 1.5‑hour conversation where I kept replying. The whole time I felt awful, like I had no control. I thought about calling a flight attendant but I was scared of making things awkward, and the plane was full so they couldn’t move me anyway. I feel disgusted and guilty. I told my husband and he was really disappointed. This sort of thing has happened to me many times. Wallahi I don’t know why I’m so open and foolish. I get really scared, especially around men, and I’m afraid my words might cause an awkward scene or put me in danger. I guess it’s from my past before Islam - I used to be a people‑pleaser, too nice and open with everyone, and even after two years as a Muslim and one year married, I still struggle. I’m terrified I’ll ruin my marriage and my husband’s trust. My marriage is perfect Al Hamdulillah and I’m so scared this problem could wreck it. Please help me - how do I stop disrespecting myself and my husband like this and fix my problem? I’m so ashamed. I know it’s not others’ fault, it’s MY fault. I’m so ashamed. JazakAllahu Khayran.