Hey PinkFizz,
You probably have nothing to worry about he is probably trying to make an effort and is sick of being ignored,
on the negative side and i'm not saying this to panic you but its on my mind due to my recent man troubles, but i'd been having niggling doubts about his behaviour for a while, for example he said he was going for a meal with his old school pal near where he works, they went for an italian and some drinks along the river, i was a bit shifty but said it will do you good etc, afterwards though he had to email his friend to invite him to a BBQ i'd told him to invite him to on the night out and he said his friend had gone on a last minute holiday he hadnt mentioned... dont think so. also he went for a night out with work one friday a few weeks ago and stayed over with the supervisor, looking back i really doubt these things! but thats just because i'm upset, but all i mean is i had these exact feelings and was proved right!