Clingy 8 year old

[Hannah]

Does anyone else have a clingy 8 year old (girl)? My daughter is an only child which I guess doesn't help. We go to gymnastics 3x a week and I have started helping there. Trouble is, she is very clingy to me, always coming over to me (we try and put me in a different group to her as I shouldn't really be teaching my own child) and gets upset quite easily there - "someone's pushed in front of me", "I don't want to go on track", and crying etc (she doesn't if I'm not there). I don't really want to stop helping as I really enjoy it but I'm not sure why she is like this. I think I was like this as a child so I can't really blame her! Last night I decided to start doing a reward (rather than a punishment) programme if she went through a session without fussing and crying and being clingy.

Does anyone else have any other suggestions? I don't think she is on the spectrum - she is bright and has lots of friends and is great in social situations. Thank you!