Help me get over my long distance ex

So I’ve been best friends with this dude for almost a year now and we dated and I was scared but he promised me he would love me right and treat me how I’m supposed to be treated and just love me !!! Well he cheated knowing what I’ve been through in past relationship so we stayed friends and…we use to sex text all the time that’s low key all we talked about and we planned on me coming to see him for my birthday. Come to find out now he has a gf now and I still wanna go see him but it would kinda be weird cuz our relationship doesn’t feel the same cuz it seems he wants to be loyal now. I love him so much and he’s the only one I want to be with please help me😕