Bf doesn't care abt as much anymore

We are in an LDR.. He's rly super super sweet at the start of the relationship.. He used to tell me how he always wants to talk to me and whenever he's with his friends(which thre isn't many), he'll always be on his phone texting me. Sometimes maybe a 20-30 min pause in between but he'll be back again checking and asking if I'm okay. 7 months down the road, he don't do that anymore.. He'll be with people and I won't get his text in like 2 hours... :( i know it's ok to not get a text for 2 hours but I just miss how things were like in the beginning :( and now it's late and he's still out, I'm tired but he's not texting back.. :(