Heart broken

my boyfriend of 2 years broke up with me 5 months ago and now is ignoring me and talking to other girls. It was a long distance relationship I live in Florida and him in Hawaii. We talked about everything together. We were even engaged and was talking about our future and children and me moving there but he woke up one day and said he couldn't do it anymore and left me completely destroyed. It's been 5 months and all I've done is cry and tighten my grip on him but I think it pushed him further away.