How can I change myself

I used to go to church and I made a few friendships and I met this girl that was my age and we became friends, I always supported her I was proud of her that she worked support her mom and siblings, she met a boy from church and got married but I noticed that she shrugs me off my mom offered her a seat at our table and she ignored and went to a different table to sit by herself I thought it was rude like you know when you turn your back on someone her husband came polite greeting us he sat at the table and told her to sit at our table and she glared at him and he went to go sit with her apologized. I tapped on her shoulder to say hello and I just wish I understood people why they reject me? What am I doing wrong

How can I be more wanted like there's people who people just gravitate to them people who are happy to see them