SUBREDDIT: r/relationships
TITLE: I [21F] read through my boyfriend [22 M] of 2 years's reddit comments; I'm now worrying he isn't over his ex and isn't happy with me
POST: Last night my boyfriend was on reddit. I saw his username for the first time. After he left, I was curious so I looked. 

I guess I shouldn't have done that. 

anyway, in an askreddit post about "what lie have you told for so long that it's part of who you are" or something like that, the comment was that he isn't over his ex girlfriend and isn't happy with me. Comment was from 9 months ago. 

I confronted him, and he said "no one on reddit tells the truth" and he's denying it. though he admits to talking to her over text message most days. 

I believe he loves me now. But I think he loves me because I please him or do things for him. Sometimes I get a feeling that he doesn't care much about me, or my own wellbeing, but more about making himself happy.
TL;DR: 
boyfriend still talks frequently with his ex after two years, seems to still like her, while telling me he loves me. What on earth am I supposed to make of this?