i am 26, my mom is around your age.... and it is hard to have mom with mood disorder.... i have spent almost every single day in my first 18 years fighting shouting match with her.... at morning shes so nice.. at evening there is always something... and it gives you headache you know... now i get it and her shouting doesn't affect me but when i was little i used to feel very sad... just like how puppy feels when you shout at him...

and words hurt you know... any mother always knows how to say something which will make her child mad...
like in film "despicable me", son is super villain and still afraid of his mother!

i too call my mom only once in month....... two years ago it was phone call per day.. but not now..... she calls my sister thrice per day now...... it doesn't mean i don't love her or something... but lets say i call her,we are gonna have some normal conversation right... then she will say something that will make me mad... like how successful neighbouring kid is... i am not that behind but still... i just reply if you want to have someone to shout at call your daughter and then i hang up the phone...

perhaps i shouldn't have written this... all my anger about my mom came out.. but you might get some insight how one thinks... and no son can really not love his mother,just like no mother can stop loving her son...