Ex boyfriend

So my boyfriend broke up with me a month ago. And I made the first mistake by begging and pleading. I tried every way to contact him but he is very secure on not wanting to speak to me. He’s been following a bunch of new girls on Instagram and seems like he’s doing great. We had a very passionate relationship and I feel like he has kind of forgotten about me and everything he felt for me. All because of my crazy actions. I feel lost