Stage 1, very treatable invasive lobular carcinoma

I just talked to my surgeon, and now have to make the decision of a lumpectomy or a mastectomy. My cancer is in my right breast only, and a small tumor, at stage one. I feel very lucky that my cancer was caught early. I am so torn between the opinions. I guess I need to hear other peoples stories. I know it is my decision alone . Thank you for anyone that can share.