Hi, and welcome!
No bikes to suggest, unfortunately, but do concentrate on feel when you test ride, and also when you get the bike back home. An ugly bike can ride like a dream (and can be painted or prettied up), an uncomfortable bike will never be good no matter how pretty it is. Good for you on returning the first one! You need to like the bike if you're going to ride it, especially if you're trying to keep up with someone faster on a better bike.
Don't be too put off if you can't keep up, btw. A lot of us have been there, and it's an unfair playing ground. Have fun riding with your bf, but if you feel slow, ride a bit alone or find a riding partner or group with a better pace for you. You can only improve so much at a time.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett