What should I do in this situation.

I'm in a relationship for the last 1.5 yrs and before that we knew each other as friends. Initially I didn't know but later on in the relationship I realised that he had recently broken up with his gf of 6 yrs with whom he had a bit of on and off for some Time and also had some other girls during that time. Right now he says he's completely faithful but has a lot of female friends which he always had but idk why he's the one everyone comes up to when they need help be it guys or girls,he is also seeking help from a therapist to deal with his issues and emotions. But does not like to discuss them with me. And alot of times he goes hot and cold in his behaviour like won't call or text back and would do maybe after 6hrs. Initially in the relationship he would call me very frequently but when he saw that his issues affected me ,he stopped sharing and due to few fights he sort of created a distance(my view)what should I do? Am I overthinking? Should I give him time or not stay together