Long relationship distance and sexting and Marriage issue

Hi i am in long distance relationships with a boy since more than 3years

In begining everything was going good. But now he has no time for me He goes to gym, enjoy time with his friends works but hardly talk on phone or online Whole day I just wait for him.

Its not like m free don't have anything to do. I also work but I have always time for him We want to marry. And he has already talk about us to his parents. But I haven't talked because m scared from my parents becoz we are from different cast.

But i thought i have to tell them. But just before 2 days I found he was doing sexting on Skype with few girls. I was shocked. He wants to marry me and he was doing sexting.

When I asked he said it was before 2 months ago when we had fight and we were not talking He hates me even if I do facebook. And when I found he did this he blamed me that I am.not doing all these with him. [he wants to do Skype chat and sexting and etc for which i am not ready]
My life is a question mark now.. I am so confused. I hate him for what he did.he How can a person be like this?

He want to marry and he cheated with me? How can i talk about our relationship and marriage with my parents when I am not sure ? What should I do?

Hii thanks for writing us.
I have found two things that u are dealing with which are very common in an LDR
1. The question of partner being loyal with u
2. The blame game ua guy is playing to hide his mistake.
Very often we find these two things between the couples in an LDR, see one thing I would like to bring your attention to at this moment before u continue to talk abt ua marriage with ua parents, you have been in a relationship from 3 long years with that guy, have you noticed him doing those things earlier as well, and you mentioned about a fight which he used as a reason for his acts, would like to know was it a fight with related to any similar kind of issue.
2ndly I like to tell you, that if he is restricting you to use social networks and he is not following the same, it is a sign that he may kind of bully you everytime and restrict you from doing other things too while keeping on doing similar things self.
Now what you do is try asking him to restrict his social networking with others like he did with you and see what he has yo answer on that, this is something very serious issue that needs to be dealt with before proceeding further, as it is a matter of trust, loyalty and freedom that a relationship needs to be carried for long

Hey what swapnil metioned that correct but thier are few things i would like to mention
- how can you trust him he has informed his parents?
- he indluged in bad acts and want you to do it over skype do u know what does it mean ? he is exploiting you
- restricting you from using facebook does it make sense especially not to me backward thinking again?
- you have all the time in the world to wait for him online?
- go and live your life dosome activities make new friends and enjoy in life
- Last thing THIS IS NOT LOVE and don't waste or spoil your life for a guy who treats you shit