Do i have separation anxiety from my child

I have a little boy who is 1 and a half and since he’s been a baby I have never liked/ wanted or let anyone have him, I thought with him been a baby I’m just scared because he’s my first. Now he’s one and half and I have family members asking to take him out to the park, food ect. But I feel like I physically can’t let me leave me without me being with him. I work 2 hours a day and he stays at my mums as she’s only round the corner from my house and we’re I work but I still hate leaving him. I cry at the thought of him going to school when he’s older in case he’s bullied. I’m scared leaving him incase people hurt him with me not being there, or he wants me but can’t tell anyone he misses me and wants me! Has anyone experienced this does it get easier? I’m constantly making up reason why people can’t have him on there own but I’m so scared to let him out my sight. Any advise TIA xx