What should you do when people say leave your first child for another one???

The toughest phase of my life really, this is very difficult to leave your kids with someone else whether they are so close to you. I don't know why boys don't have feelings they just keep on enjoying their lives, why girls suffer from all the things. When I got married, I was not ready. When I gave birth to my first daughter I was not ready but, I loved her a lot 'but' God wanted something else. God took my daughter from me and leave me alone because my husband was too busy with his 'so' cold online friends 'and' I was very upset for this stupid marriage but, I compromise and pray for another baby 'so' I could be  busy in him 'but' God gave me wait. After 3 years, I got another baby. I was so happy 'and' gave my all love and attention to him. This was the best period of my marriage 'and' then I was enjoying my life. I was so engaged with my child, means he was the only reason of my happiness. My husband keep on investing his time on phone now he doesn't chat with girls 'but' his life was for his phone, I was just a thing for him. He 'never' realized I wanted his time I told him many times I need your time but, there were so many fights. So, I start to busy with my child and noticed his everything. I used to smile when he smiles I stated loving him more than anything and God gave me another good news and people started saying leave him with his grandparents. Is that easy to leave your child I don't know what other things but, I want him near me. He was just 2 years, old boy and I had to leave him with his grandparents and I swear this is the worst thing in my life. I cry, I weep, I can't express my feelings with anyone because I know nobody will listen to me. I used to write diary this was my habit 'but' my husband read my diary. Now he says don't they love him, are they careless. I don't know how do I make him understand this not about care. I just can't sleep without him. I invested my all love to him. I know I have another baby but, this doesn't mean I will forget my elder baby. He was like a light for me in my darkest phase, I can't imagine my one day without him. He is a hope for me for my  happiness. I took care of him when he was not able to say a single word 'now' he tells everything 'so' I should leave him. I enjoy his company. This is a very difficult for a girl, she has no rights to speak in this era. Everybody wanted a girl who has no tongue. Who can not say a single word against them. It is a very bad situation. What should I do in this situation, please suggest me.