commitment issues?

so i’ve been with my bf for almost 3 years, long distance for the last year. we have a great relationship and sex life, we still meet up often and we don’t really argue, if we have issues we talk about it. but i’ve noticed when it comes to talking long term or anything serious he always tries to change the subject. (for all my astrology gals he’s a sag so i assumed he was just a slow mover or he needed to take his own time with his commitments) but it’s been almost 3 years and i have yet to meet his family (they live about 6 1/2 hrs away, but of course i’d be there if he asked me to) and he hasn’t told me he loves me. anytime i bring up meeting his family he kinda changes the subject and i’ve made comments about my friends asking me why we don’t tell each other that we love each other, hoping to provoke a conversation about it, but he always comes back about how nosey they are and then once again the subject will change. i know this is something that needs to be talked about and i really don’t know why i’m so scared to be straight up about these topics. i want to know why i haven’t met his family and why he doesn’t love me or if he feels he ever will, but i don’t want to scare him off for bringing it up in the wrong way. how do i approach this without coming off too aggressive?