She knew you got the message... She want's you to know she is always with you....it's all good.

When ready you could introduce yourself and just ask her to meet for coffee. Then you could rxplain that you are still are missing you wife, but open to friendships. Then just look for things you have income.
Bet you might find a good friend without getting ahead of yourself.

just take your time...

You’ll know when you’re ready. There is no rush.

It has been 6 years since my husband died. Took a good 4 years for me to start feeling somewhat "normal" again. I was super angry for a long time. We were married for 32 years and 1 day. He was my best friend, we did everything together. It was so difficult (and still is) to live my life without my person by my side. Even now after all this time, I still want to talk to him about my day, politics, our pets...everything. My advice - take your time because time is the only thing that helps.

Again, my condolences. Losing a spouse is brutal.

The veneer of feeling normal gets a little thicker as time passes. I have some pictures of my husband where I can see them, and I talk to him.
I don't mind talking to men when I'm out, but it's just chitchat, and keeps me sociable.

You lost your wife in a traumatic way and way too soon. One of these days you'll return a smile, enjoy a bit of conversation. How soon is up to you. How far any chance meeting will go is also up to you. Don't feel bad if you aren't ready or don't want something more.