Just need to vent...

I love this guy so damn much, we've been through hell and back, I've done wrong and he always took me back and never judged me and let the past be the past. I know he would never hurt me, I know he's always busy, but I stay questioning him. I try not too, but I can't help not doing so.. I love him, but I feel as though I'm going to lose him. He's getting tired of me, but he says some things sometimes that are just mean.. Like telling me he doesn't care or whatever when I tell how I feel etc... But I know it's from not trusting anyone and he doesn't show his feelings, it BUGS THE FUCK OUT OF ME!!!!! I don't know what to do because I'm at my breaking point and he acts childish a lot, but we both care but idk.... I'm confused and I'm honestly giving up, and I know it's gonna hurt... But I'm just lost.....