I don't think any of you have the right to say if this person is ready to be a parent or not. I am in the EXACT same shoes, minus the adoption stuff, and a age difference. the point is she came on here for some support and a little advice. Follow the old rule, if you can't say anything nice, SHUT THE F*UCK up.
My best advice to you would be keep trying to conceive on your own, you have only been at it with meds for a short time give them a chance to work so you can get a BFP of your own. If this doesn't work after a few years look into other methods. I would say give the adoption thing a little break and try for your own. This can happen for you. I also totally get the depression thing with other people being preggo. It is hard to be happy for them,when you are struggling with your own issues.