Second Chance?

[PinkDotsXOXO]

Hey all, thanks in advance for your help!

My ex of 7.5 years broke up with me April of last year. I was heartbroken and it was not the nicest of breakups. We still hung out and went on a vacation together after the breakup until about last summer when he decided to start dating his sister’s ex friend who is now his girlfriend (his family does not particularly like her for a number of reasons but puts up with his decision). I have remained close with his entire family and I talk with them often. Him and I stopped talking for a long while but then began talking and texting. At first, this was just through text, which progressed to phone calls. We both take turns calling and texting one another. His girlfriend found out he was talking to me and screamed at him so he’s kept it a secret. I bumped into him accidentally at the casino the other day while he was with his girlfriend. He smiled and waved at me and looked VERY happy to see me. She gave me a dirty look. He called to tell me that she was mad that he looked so happy and waved to me and he informed me that she wants to punch me in the face and she screamed at him for 2 days straight. Not too long ago, he told me he sometimes misses me and it was nice to see me again. My grandmother recently passed away and he knew how close I was to her and when we were together he was close to her too. Since that happened, he’s been calling and texting more and has now asked to see me on Sunday and go out for a drink. (Of course he isn’t telling his girlfriend). I haven’t seen him since that time I accidentally saw him at the casino but the last time I actually had PLANS to see him was months and months ago. I know that if he wanted to be with me he would but, his girlfriend controls his life and I know he hates people butting into his business. If I play my cards right, is there any chance I can help him to see the light and not be with her? I of course would want to work things out with him but it’s more than that. I really want to see him happy with someone who deserves him… even if it isn’t me. I just don’t know what to do.