Tomato question

Tomato question

Hey everyone, I've been watching this community for a while, though this is my first post. I hope to make friends with other plant loving folk :) I am growing some tomatoes, and a few of my plants have been flowering but then shriveling and dying, without setting fruit. The problem seems to start a bit father back on the stem, not just the flower going, but a portion of stem as well. Anyone have any idea what has caused this? I'd appreciate any insights :)
i’m new!

i’m new!

New here

New here

My Room.

My Room.

Plant ID please

Plant ID please

Need Some Inspiration.

Need Some Inspiration.

Traces of time.

Traces of time.