Relationships

My boyfriend isn't talking to me anymore. The extent to our convos are 1-2 word replies to eachother 3-4 times a day and that's if I text him first. He doesn't call me at all, doesn't take much interest to. And I don't call him anymore cause he's always too busy to talk for long. The most I get to say to him is hey and by then he makes an excuse to hang up. We are long distance and started as long distance for 7 months now. I live 6 hours away, which isn't bad and I go visit him very often (atleast once a month, most of the time more) for weeks. I'm frustrated at this point cause it doesn't feel like we are even dating anymore and I'm not even sure if it's just me stressing and being annoying or if this is it.