Search Results: getting over a long term relationship

Okay so there's this guy I've been on and off but never official with for over nine months. I kept going back to him after he did stupid stuff. Well as of the 19th of last month were official. Ever since then he's stopped flirting with other girls, he hasn't cheated, and his ex asked him out and he told me about it as soon as she did it "so I didn't get mad and not trust him". He has a pretty bad past of lying and cheating but it seems like he's serious about us. He texts me every night and tells me he loves me, he spends time with me every chance he gets even if its stuff he hates doing, he's full of random compliments, we kiss but he also kisses my forehead, cheek, and stuff to - which I find completely sweet. Plus when we talk about us staying together...Im a little hesitant to believe its going to last a long time (even though I want it to) but he always insists that he's not screwing it up this time because I told him this was the last chance he was ever getting because I'm tired of wasting my time. And even as early as August he's already like so what do you want for Christmas...do you plan on spending my birthday with me, etc. Aka things that are kind of far away. So its seems like he's thinking long term. So my question is could he have changed and we actually have a long happy relationship or is it to good to be true? And why?