Relationship problems

Recently I meet a guy, he tried to pursue me maybe a year ago but I didn't give him any play. Fast forward end of 2018, we dated. Went on a date weekly, one time twice in a week. He was moving quickly from the beginning and after two weeks told me that he love me. Everything was good until he said that, it's like I'm turned off now. Is that weird? I often withdraw from guys who are into me. When they start talking about weddings and kids, I run. Sometimes I feel that I won't be able to be a good girlfriend because I get uninterested quickly and often want something "new." Idk if this a confession or venting. 🤷