so How often can i strength train?

I normally do strength training exercises ( nothing elaborate, just regular squats, lunges, planks and some stretches ) after every run. And i run 5 times a week. I want to know how often should i do these exercises to get the best out of them. Is it possible I am doing them too often than needed? or what? How often do you do it?

I live in india. I love running. Unfortunately i find myself with lack of friends who share the same interest or a coach who could guide me. So i hope you guys could answer some of my questions.