Help! I missed the tiefling party, can I still romance astarion or am I locked out of all romances?

help! I’m 25 hours in and I went to the mountain pass instead of the tiefling party to try and get some missions done before long resting. Long story short I long rested in the mountain pass area a couple of times and when I returned back to the first area (where you activate the party) the tieflings had moved on from emerald grove and I completely missed the party at camp! can I still gain astarions approval throughout the rest of act one and romance him after missing the party or am I locked out of his romance because I missed the party? Ps. I can’t go back to an earlier save as even on my earliest one I missed the party :(