Search Results: guy not returning calls

So bascily this girl and me have been talking to each over the past nearly 2 months.
We both met in social media, and ever since we are super close and have deep conversation and yeah just in general. She lives pretty far from me, so we used to video call each other couple times of week and used to call each other daily. we still need to learn about each other.
So the girl and me always talk at night time and midnights, have deep conversation about life, goals in general. She is always in my mind at morning to the night.
Then...
She met her ex, once , then twice, then 3 times, who knows more. I don't even know to this day if she hanging out with him daily. I feel as if she started to get feeling for him, and less for me. Now when ever we talk. I always have to start the conversation , she used to be so happy and loving, now is less. Her and the ex, walk to together, watch movie togehter, hang out late. more dull in general when she anwsers me back like.
At Night time :
Me:" Yooooooo "
Her:" Sup " ( After couple of minutes )
Me:" What you up too "
Her:" Not much "
( She never ask's me what I'm up to like last time )
Me:" soooo "
Her: " sooooo"
( Not chat for like hours )
. I think I gambled to much for her, everything was going to track until the ex came in.
Note : She ain't my girlfriend, but could be
To be honest ATM, I feel I put in too much for her, to the point of not talking to her anymore, because I get little in return. But To be fair, i used to talk to her best friend, and i would send her and the girl the same picture at snapchat. After she found out, she became less, I told her I will fix it, which I did. ( I removed everyone but her, like last time. The only reason why I still have my phone is because of her, And I still see potential.
She is the one ( like for real , I never had a girlfriend )
But I can't really tell her who she can see and not, but seeing your ex and talking to someone you love is just wrong.