Should I send her a Valentine's Day card?

The girl that I like is very shy.

In the past she was physically abused by boyfriends.

She is very protective of herself.

I have tried to ask her out, but she spooked.

It is clear though that we are really attracted to one another though.

We have not dated yet; she is way too guarded and I need to show her that I can be trusted first.

I think that sending flowers would scare her.

Would it be acceptable to send her a Valentines Day card in the mail? Is this too forward?

What does everyone think?
Should I send her a Valentine's Day card?
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