<human>: Married for 15 years. Two kids (9 and 5). Sex has often been an issue - her with a lower libido than me, and neither of us communicating well about it even though we otherwise communicate well. 
Two years ago, I tried to make a change by trying a few new things. I upped the romance - flowers, cards for no reason, dates. I booked a hotel room for valentines day. Several other things. I also suggested we just schedule sex once a week to see if that  would help. Tried for about 6 weeks and it didn't last. 
Then in the past year I tried talking to her about some relationship apps, sexual improvement websites, and books. She rejected each. Her typical explanation for not being in he mood is that she's stressed ( work, house cleaning, kids ) and has a poor body image. She has a more stressful job than I, and I end up with majority of housework and kid care because of my more regular hours. 
I had a revelation that my repeated asking was probably just adding to the stress. Plus it was unattractive - making me appear needy, unmanly. So I've left it all alone for maybe three months. I've worked on myself - my health, my confidence, my appearance. 
Is it safe to kick back in with some romance and wooing - not asking for sex, but trying to create the mood? Is it safe to start up discussions again? Or will I ruin all the 'work' I've done trying to reduce the stress of my asking for it and trying to reclaim my manliness?
Thanks in advance for your perspective.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I was a nice guy, but probably just stressed out wife more when asking for / talking about sex. It's been 3 months. Can I safely bring up sex again?