Don't feel you are "giving in" if you feed her. If she needs the comfort then she needs the comfort, no need to feel that is a negative thing.
Feeds at 11.30pm, 2.30am and 5am for a 4 or 5 month old ebf baby is reasonably normal.
The feed at 6.30pm then again 8.30pm would be the outer limit of my expectations. I wouldn't have been suprised surprised if a feed was needed sooner.
I aim to feed every 90m-2h through the "daytime" (daytime being my daytime - so 7am to 10.30pm ish). Valley liad while I am awake so that fewer calories are needed at night.
Are you putting baby "to bed" (ie upstairs in cot) at 6.30pm? Aside from SIDS recomendation that baby stays downstairs with you until you go to bed, I found it much more convenient. Lots of on and off feeding through the evening (while I'm watching tv) means baby settles more easily when you go up to bed with her.
What's your daytime naps like? I favoured a 90m-2h EASY cycle. Repeated constantly 7am until I go to bed.
E - Eat. Start with a full feed. Note the time of waking
A -Awake activity. Floor time, cuddle A. Playgym, whatever. First sign of grumpiness means sleep time. I'd limit awake time to about an hour
S - Sleep. 30-45 mins is normal. I cannot stress enough how great bouncy chairs with dummy are for daytime sleeps.
Y - You time while baby sleeps.
So at the nearest awake time to 7-8pm ish I'd do "bedtime routine" - bath, massage, change into night clothes etc. But baby would come back downstairs to nap and feed on and off in the bouncy chair until I go to bed.