I want to tell him

I've been dating my bf for six months and neither of us have said I love you yet and I want to. I'm scared to because what if he gets scared. His last relationship he ended up with a broken heart and said to me (before we were together, and only friends) that he would only say it when he really felt it and I'm scared he doesn't love me. I want him to know, I've wanted him to know for almost two months, I almost said it last night and then backed out. I just want to say it but I don't know when or where