girls think we not spend time with them but it is not trus we try but my works like job , friends , family we manage all whereas, she allway active on social media and constant msg me for time so what i do ???

Leave her in her self-centered mind quagmire and continue to do things the way that satisfies you regardless of her childish demands, that includes when you contact her and the way you like your schedule to be.
Just because she calls herself your girlfriend doesn't mean you have to lose your right to be an individual with a personal life and a biological family you love and care about.
If she tries to dictate your way of life and every move down to what time you'll have for what and whom, imagine what your married life will be.
Would you be willing to put up with that kind of insecurity, negativity and self-absorbed tyranny for the rest of your life?

Ajaybhaliya, I doubt that you are seriously wanting to be with that particular girl. Otherwise you would make time for her.

I also think so

If you love somebody, isn't it just right to give her/him quality time? If there's a will there's a way. Question: is your gf working or not? Does she demand you to answer her messages all the time even if you are at work? There are at times when a woman is not working and have nothing to do, so she messages her bf, it is because you are constantly on her mind and you should appreciate that in your absence or no matter how far away you are from each other, thoughts of you never stray away from her heart and mind. Unless if she demands from you to reply even if you are working , then that would be too unreasonable, but if she just messages you doesn't mean she forces you to answer. She only wants you to know that she misses you and she's thinking of you. I had a bf before who constantly messaged me and I felt guilty because I was busy at work then and I make it my rule not to take personal call or messages when at work. I talked to him and tell him sorry if I couldn't reply , but I will when I have time or break. But I make sure that when I get home I spend time with him talking on the phone or online. There was also a time when I didn't have a job, I always messaged my bf but I wasn't expecting or demanding him to reply, if he replies , thank you, if not, it's OK I'll just wait whenever he's available. Don't force yourself to reply just to please her or because you don't want her to feel bad. Coz you might get tired doing it. You must do things for her because that's what's in your heart and you are happy doing it. Try to ask her why she messages you always, and talk about it, set limitations when and why it should be. It's understandable that every individual have priorities in life , most often family and work are on the top lists. Who or what is your priority? Make a compromise.