I need advice on how to move on or let go

I just had a break up from my long distance relationship for 4 years. We never met and only communicated through online sites. She broke up with me because she couldnt handle the distance anymore, she was hurting because I couldn't be physically with her. She told me she wants to experience the physical contact i couldnt provide. At first she was confused because she didnt want to leave me, that i was important to her, that i changed her and i was the only one who was so patient with her, that i was nothing but good towards her but the pain of nit being around her to hug her and comfort her was too strong. I did try my best to convinced her that when the time we meet it will be worth it, she did decided to stay but a few days after i can see how hurt she is how much she needed the physical assurance that i couldnt do anything anymore but give up. She insisted that we stay friends and keep in touch. We still talk after the break up, 2 weeks after she told me she started seeing someone and it really took a massive toll on me because i saw pictures of them being intimate, i saw how happy she is. While i truly cheered for her happiness it just hurt me so bad, its painful for me. At one point i literally felt my heart tearing apart. Im hurting so bad, im crying everyday whenever i think about her.