I wanted to join these two sentances together.

She was so much more than that.
She was like a mother.

Could I write it like this:

She was so much more than that; she was like a mother.

Does that make sense?

yes it makes sense, but i would join the sentences together with a comma, not a semi-colon. :)

would it kind of be a run on sentance?

Lena -- it's a good sentence! You are right; a semi-colon belongs after "that."

no, a run on sentence would go on longer than that, and include multiple (more than one) subject. in which case, this sentence remains on topic and is not a run-on. :)

A run on sentence doesn't have to be long.

This sentence has two subjects and verbs.

SHE WAS -- are the subject and verb in both clauses.

I think I just learned something that even my teacher couldn't have told me!!! (and it's not even my topic!) ^^ thank you!

Thanks Nicole and Ms. Sue :)

You're welcome Lena and Nicole. Glad I could help both of you. :-)

Yes, your suggestion to join the two sentences by using a semicolon is correct. By using a semicolon, you can create a connection between the two thoughts. However, in this case, using a conjunction like "and" might be more appropriate because the two ideas are closely related. So, your revised sentence would be:

"She was so much more than that, and she was like a mother."

This sentence combines the two separate statements into a single sentence, expressing the idea that she was not just "that," but also resembled a mother.