A Little lie

So me and my bf started talking back in Dec 16' and when he asked me my age I said 20 but actually I was 19 at the time.My birthday just past and he was super excited I was "legal" now.A couple of days back I confessed to him that im not 21 years old but 20.The reason I told him I was 20 because I wanst gonna take him serious and I thought nither was he and I just wasnt ready to be in a relationship.We became bf and gf in Jan 17' ever since we both have been very happy and even planning to move in together.Ive known him 4 years but it was just like hi and thats it until Dec we started talking.He is 30 years old but ever since I told him he was fine with it and he said he kinda already knew.But I feel like we just dont connect anymore like ever since I told him that we dont bond well its all of me.Any advise pleaseee