Can borderlines become foster parents?

Hubby and I have been talking a long time about becoming foster parents. I have my doubts if "they" will let me , though. I called the local adoption/foster place today. The lady wasn't in , but I left amessage for her to call me. It's been about a year and a half of us trying to get pregnant and I'm so frustrated. Maybe I wasn't meant to be a mom. At the get together, I rocked and read to niecey poo #2 and it fel tso right. Humph.