Need some advice please

Me and a long time friend just started dating it has been only 3 months since we been officially together. He is almost like a local celebrity he owns his own business. Now I want to support him and be a girlfriend that is not jealous or overreact. He has many many female customers and so many women want him. He reassures me that he loves me but I’m not sure how to feel when he is so extra friendly to the females he has to interact with. He tells me to trust him I do but this is a lot for me I just don’t want to end up looking like a fool. I also don’t want to overreact either. I need help on how to handle this situation. Not sure if someone can relate and can tell me how they handle this kind of situation. Pleaseeeee need guidance!