BLW losing faith!

[babybouncer]

I started trying to wean DS just before 6 months and having been very excited to begin with, he began refusing purees within a couple of weeks. I've been trying to do BLW since and he's now 7 1/2 months, but still doesn't seem to be eating anything. He's got the hang of biting, so he can make a huge mess, but doesn't seem to chew anything or swallow it.
I've tried giving him yoghurt, porridge and soup on a spoon and he bats it away every time. He rejects most vegetables (although I keep trying them) and has started being picky about fruit, too. Also, he won't touch anything sticky, like pasta in a sauce. So his diet mainly consists of organix crisps, bread products, apple and cucumber.
He's not a small baby (22lbs), but I worry that he's really only having milk (should I have moved on to follow-on milk?) and isn't learning to eat and is becoming very picky.
What was your experience of BLW?

My sister has been doing BLW successfully since her DS was 6 months although she's been a bit stressed at times when he seemed to stop eating anything apart from banana! However, she didn't make a big fuss in front of him, just carried on putting squares of toast, pieces of banana, healthy cereal pieces and chunks of pear on his highchair table and if he ate it, he did and if he didn't, she just cleaned up and took him out. She knows he's having his milk and if he's having an off day, that's fine, he'll eat when hungry. I think it's hard for adults not to feel like they're starving their baby if they don't eat the same amounts each day but if you add up what your DS has actually had in a day, I bet it's plenty. Don't forget, he might be having trouble with teeth or perhaps a cold or just not feeling that hungry.
If you tried roasting some veg so it was soft and sweet, could he hold a few chunks of that perhaps? Grated cheese just placed on the table? Share your plate with him so he picks off it? Don't worry though - give him what he will eat and when he's had it, praise him to the hills and then hopefully you'll be able to introduce other stuff too. Another idea is to always have some familiar stuff with any new stuff that's on the plate.