Out of love?

My boyfriend came to visit me for the first time after 4 months last night (I went abroad) and I don't know if we have lost our connection. We had sex once and I wanted to again before bed and he said he was too tired and then the morning after that night he lost his boner in the middle of morning sex. After not seeing each other for months I didn't think we would have this problem..... I'm wondering if he still finds me attractive?