If you were single and trying to get pregnant, would you use a donor you know personally?

I am recently(year ago) divorced and decided my family goals don't need to be put on the back burner until I meet another perspective partner. I have a friend who volunteered to be a donor with no legal or emotional strings attached. At first I was all for it. He's a great man, gorgeous and kind so why not? He gets to have sex very often (1-2 a day) without drama and I am getting a life long dream. Well what I didn't prepare myself for was falling for guy.. I'm starting to get some really heavy feeling for him and I'm also about to move to a different state. We wont be able to continue seeing each other after I move. And honestly I didn't think I would even be able to get pregnant since I have pretty severe endrometrious. It's been two months now and my period is a week late.. I took a pregnancy test but it came back negative. A friend of mine said it's too early for a pregnancy test to tell. Anyways I would love to hear some outside perspectives. Am I crazy for putting myself in this situation? Would you use a known donor? If I'm not pregnant should I keep trying with him?