My friend is mad at me...

So I'm not sure how to fix this...

My friend is my son's godmother and she's great. There is nothing bad I can say about her.

For about a year now, I have been very closed off to her and she has definitely noticed and is mad. When I do see her, she always makes the comment "you never talk to me anymore."

The thing is, it's true. I don't talk to her anymore. But there is no bad reason why.

Between my 9 hour work days, my 2 years old son (her godson) who still wakes up every 2-3 hour at night, and the few hours I have at home after work which involved cleaning, cooking, relaxing, etc. I just don't have time for much else. Yes, I do spend time with my father and my husband's family and sometimes a friend or 2 that live nearby but that is usually time at their home's or my home relaxing.

My friend is a single mother who has a 19 year old son and her free time is spend going out drinking, or going to comedy shows, or doing things that aren't being home. Also, she lives about 1.5 hours away from me so the last thing I want to do after my long days and little sleep is travel to her home.

Truth is she has done nothing wrong and I still love her but I'm busy being a mom to a young child and trying to balance work and home life. I have no interest in comedy clubs, or going out for drinks, or even putting makeup on to go to a restaurant for a bite.

Also, I am 3 months pregnant and haven't told her. This pregnancy drains me of what little energy I do have left. So in all honesty, I like being a recluse and not doing anything that involves entertaining people or going out. My idea of a wonderful day is sitting on the couch watching my 2 year old play with his toys and me watching Netflix with my husband.

I want her to know I love her and me being distant has nothing to do with her or something thay she did but I don't know how to do it.

I tried looking online for letters I can use as go-bys to help me explain to her why I'm being distant but I couldn't find any and I don't think I'm a good enough writer to write one by myself. Also, I don't really want to tell her via text or via a phone call because I know I'll get flustered and just make things worst.

Not sure if anyone here can give me ideas or anything but I guess I just wanted to put this out there so I can feel a little better.