Search Results: stay up and chat with a girl

We have been a year relationship with my boyfriend.
But he has to go to another city to earn money.

Last July, my boyfriend visited me and I saw that there was a girl who keeps calling him and he won't take the call. When he left the phone in the car, he named this girl Dianne girlfriend in another city. This girl texted him, babe how are you doing? I got to my boyfriend and confronted him about it. He said it's just a typo error of girlfriend and we are just friends.

On August - October, my boyfriend visits me one to two weeks per month. We still have communication and we see each other.

On November, I called my boyfriend at 3 AM, I wonder why he can't take my calls.
I keep calling him until he answers.
On the next day, there was a girl who chatted me on facebook named Dianne. I was shock because it seems that this girl is spying on me. She saw my name on his phone while playing a game on his phone at 3 Am and ask if am his girlfriend. She said she wants to know the truth. my boyfriend said to her that we already break up. I ask this girl if they have a relationship with my boyfriend and if they had sex. She said no we are just friends and we have never had sex and we are many in the house with my other friends. I only told him that you can stay in our house but you have to respect them. She said she just wants to know the truth about us. . I told her I am his girlfriend. This girl said I don't want to break any relationship. I am just his friend and he stays at my house. I should not tell him that she chatted with
I confronted my boyfriend about this girl who chatted with d later on, Dianne blocked me on facebook.

I am confused

Unfortunately, I live with my boyfriend but he stays in another city to earn money.
We split house bills in the house and only goes home one to two weeks per month.
Four months ago, I saw a girl who keeps calling him every 30 minutes but he won't take it.
Until such time, I get his phone and he named it "Dianne Manila GF" and her text "Babe, how are you doing?"I woke him up and get mad. He denied it and said. I don't like her she is just my friend."

There was a time where I ask him that I want to follow him in the City and just apply work there. He said a BIG NO, we can't be together anyway. We have to rent. I keep calling him every night but I wonder why he can't even answer my calls. I get annoyed and put him into test thinking he maybe living with a girl.

At 2AM , I keep calling him and say if you won't pick up my phone I will think that you are really living with a girl there and you are cheating on me!!! He was terrified and keeps canceling my call. Until after 15 minutes, he answers my call and said What do you want? We keep talking for how many minutes. And suddenly the day after, someone chats me on Facebook and her name is "Dianne", she ask if I am his girlfriend who called him at 2 AM? She said she saw my name while she is playing a game on his phone. She also said HE also stays with her. She knows at first that he has a girlfriend, but later on, my boyfriend said we already break up. She said, she just wants to know the Truth. I said YES, I AM HIS GIRLFRIEND. , She said, they met last July in Tinder and said I don't want to break any relationship. We are just friends. I call immediately my boyfriend and this girl suddenly block me on facebook.

WTF. should I believe him or dump hi, m? Is there an INFIDELITY GOING ON?