Self pity

I am new in this kind of blog so please bear with me. I am a married person with 3 kids 2 secondary and 1 primary. I started having a self pity after my husband is showing no interest in talking to me anymore. Although I always seen him online in fb but he never ask how I am, have I eaten already, it is always me started asking him how's his day or what he has eaten for his breakfast, lunch or dinner. It keeps me wondering why he is always online but he never even msg me and when I asked why he said he always shown online even he is not facebooking or when he is connected to wifi. Is it possible? I don't want to argue with him because he easily gets angry whenever you explain to him this and that. And one time I've checked his phone and saw a text message asking a girl to have lunch when I confronted him he said he is not alone they are a group together had lunch. I said oh wow, you can ask someone to have lunch but you never ask me if I'm already eaten or not? It makes me really angry inside. I don't understand myself anymore. But as a wife , don't I have the right to feel jealous? Is he acting like it's ok without considering my feelings? He hurt me many times already but I let it passed because I don't want to have a broken family. For the sake of my kids I always forgave him. And everytime he needs something like money he is so sweet, once he already got what he needs he will start ignoring me again. By the way, ever since we got married he never gave his salary to me and I never asked because we both have work. And I have no idea also how much he earned. I'm getting tired like this. Should I give up now?