Hi everyone, this is a very hard post for me to make because it concerns my 5-year-old daughter and her social interaction with other kids, and I hate seeing and knowing that there is a problem growing in there somehow which I am clueless on how to fix.

First off, I'll let you in on her background, she grew up as an only child in our home, she did not have any playmates until she started pre-school which was when she was 3.
At this time, we faced problems everyday to get her to go to school. She'd be okay during the drive to school but when we get to her classroom she would just cry and beg us not to leave her. It breaks my heart to see such a reaction from my very sweet 3-year-old daughter, and until now remembering those times it breaks my heart still. After 6 months in that pre-school my mother decided to let my daughter have a break, and we decided maybe she would be ready for school by the time she turned 4.

At 4 years old, we enrolled her at another nursery school, and though at first she had trouble interacting with the other children (she was shy and not used to seeing so many kids at the same time), she eventually adjusted and started to enjoy going to school. There are times however when she has bad days, and usually I blame myself endlessly. "Bad days" would be when she arrives late in school and classes have already started (never her fault though - always mine) and whenever she sees that classes are already ongoing, she refuses to enter the classroom already. I would have to force her in, beg her in, or get angry. It hurts me to be that way to her because I am fully aware that we were tardy because of me.

Now, although she has learned to interact well with others, she is starting to grow very self-conscious. This, at 5 years old, is something I just don't want for her to be so concerned about yet.
She is quite a chubby little girl, and apparently this matters to her a lot. She does not wear anything that does not have sleeves, and she actually hides from people when she's seen wearing them.

My daughter is a very sweet girl, very smart and I love her a lot. She doesn't have tantrums at home, and she never gives us a hard time even when she sees a toy she wants at the mall, when I say no, she understands just like an adult and leaves the toy alone.
It eats at me seeing that my daughter seems to be suffering these insecurities, is it something that I do as a parent that have brought forth any of these?

I tell her "I love you" all the time because I want her to know that she is very much loved, and I always do my best to buy what she wants because she only asks every once in a blue moon, she is a perfect little girl and I only have her best interest at heart. How can I boost her confidence to make her feel beautiful and worthy?