Hey!
I am 23yrs old girl from pakistan..
What I wanted to ask is that I have been in a relationship with a guy for the last seven years.. there have been many ups and downs in our relationship.. there are other girls in his life too but he says they are just friends but this time when we met I just checked his phone and there was conversation with some other girl-i could read the converstion because he took the mobile from me but I saw that the girl had sent him her nude pictures.he gave me the excuse that the girl was after him and she wanted to talk to him., please tell me what should I do?

It never ceases to amaze me that this happens all over the world. I would break up with him. I don't believe that she is just 'after him' without any encouragement from him. Texting maybe, nude pictures no. You still are young and can start over. At the very least, he can do a lot of work to win you back after months of proof that he is faithful to you. You need your pride.

And they were continuously in contact with each other for the last three months and even before that... and he deleted the entire conversation before I could even read it... I think I should but its so difficult for me.. my mind doesn't accept it

You either dump him or continue to not know what to do. The guy is probably cheating. The choice is yours.

Let me guess - you have already asked other people and they all say the same thing. But you don't really want to hear it or believe it, so you just keep going, and going, and going... and then you will be 30 and then what? Are you two planning on marriage? It doesn't matter. He will fool around more after marriage than before he has to tied down to children and keeping house. Have fun living your whole life this way because you are afraid to leave.

Yes you are right... I really am afraid to leave

You should be afraid of what would happen to you self esteem and respect if you stay.

And now he is apologising all the time and saying he is sorry and it was the girl who was after him and all... that girl even called me and said half of the time we used to talk about you and he really loves you and I was the one who went after him and things like that..

He no doubt had her do it. If she did go after him, he did not have to continue to talk to her. The guy sounds like a real creep.
Do what you want, you will anyway. You are not ready to do what you should... which is leave him.

Break up with him. He does not respect you. And you've been dating him for 7 years and this is how he's "matured" in the relationship? Forget about it - he'll only get worse. Do you still live in Pakistan?

I don't understand why would the girl lie?

Because you boyfriend told her to. That is why she would lie. He does not want to be found out for the cheat he is. Wise up. How many more years are you going to waste on this guy?