crying when i leave him.

[edgetop]

my ds started reception 4 weeks ago,he is with other children he went to playgroup with, also he has made new friends he is really enjoying it he talks non stop about it at home.he likes his teachers,so no problems.
on a morning i have to have him peeled off me he crys i get upset but keep it inside so he cant see me get upset.
should i ask the teacher if they will take him from me when we first go in,i dont like asking as i know they have other children to see to ,i notice not maney of them cry so they could maybe just get him out of this phase.