Need little bit of Encouragement

So I’m back in the dating game after 15 years of marriage. I’m currently 5”4 and 260lbs size 22.

Totally not feeling myself. Myself confidence is totally shattered. Mostly because on my ex. I started talking to somebody about 3 weeks ago. He makes me feel grate but I still have reservations And insecurities. Has anybody been in this kind of situation? How do you work on building yourself back up?