Love, Emotions

So im 14 am yeah I may be too young so an adult will say but I've been thru a lot I was with my last boyfriend for 3 years and then my mom moved me and my sisters to a different state I thought we would last because I trusted him but when I left he was talking to other girls n when I asked he lied when ofc us girls always have proff so I broke up with him I was so attached to him like we were literally one I talked like him n everything he was my everything but I wanna ask does that mean he was my first love? I mean after him I thought I'd never move on being in a new state new school with knew people I went thru deep depression I wouldn't eat and yet no one noticed not even my mom but that was until I met my new Boyfriend Romeo yes that's his name by the way my name is Nylah not Juliet but we've been together for 3months now and I really feel like I love him but I won't let him in because I'm afraid to get my heart broken again😰😭 I mean it hurts so bad I used to cry myself to sleep every night but how can u complain when my boyfriend comes from a broken family and home moving from home to home mom and dad and step mom I can't imagine but me n him used to have so much time together but now it's like we don't and it's only been three months. Why won't I let him in? Maybe because I still hurt I have so much hidden not like break up hidden but like back story of my life hidden what I've been thru I wish I could tell him. He did say the first I love you n I felt bad because I was like please don't lie to me and he said he meant it so I'm asking you all for advice I can't coup what should I do because where only 14 and my feeling are everywhere i just can't handle it anymore. Plz help me figure myself out?