DEAR AMY: I’m a middle-aged man. My sister who lives out of state and stays in touch with hometown friends connected me with one of her friends “Susan,” who needed help with a minor home repair. I did this for her, and we discussed a future flooring project. Due to her budget constraints I suggested that we could do the flooring job together (I was mildly interested in her). I thought that maybe I creeped her out, because I never heard from her again. Fast-forward two years. I connected with a woman on a dating app who is friends with both my sister and Susan. The new woman, “Jill,” told me on…