Half and half

Not sure if it’s okay to talk about on this app but my dads Irish and my moms Mexican. I never feel secure in either group . I’m mixed but when I’m surrounded by my Mexican peers I don’t feel Mexican enough and when I’m around my Irish peers I don’t feel like I’m white enough . I’m not sure how to get myself to the point where I’m okay with myself. I’m 21 and last week when I was at work a customer made a remark about my race to my coworker , I wasn’t sure why she didn’t want my help and wanted hers instead . . My coworker told me later it was because I was Mexican the customer said ( I don’t have an accent ). I’m just not sure how to handle situations like this . It was heartbreaking to know my appearance pushed her away from me . Then when I’m around my Mexican family they speak Spanish and I don’t so they look at me different like they can’t connect with me.How can I learn to deal with this.