<human>: So here's the situation: 

My current employer, Company X is an MNC with great culture and interesting jobscope. However, the salary's on the lower end and I don't foresee much room for career progression. 

I've been on a contract role with Company X for about 2 years now and I'm starting to feel a bit jaded.

So along comes an offer from Company Y. It's a smaller boutique-sized firm but they are able to give me an attractive wage and a permanent role that's a step up from my current position. It also promises plenty of learning opportunities.  

I'm keen on Company Y's offer. They are even willing to buy out my notice period with Company X because they need me to be on-boarded ASAP. 

Here's the problem: I'm currently in the midst of running a major campaign this month for Company X (with some travelling involved).  

Out of courtesy, I've informed my manager about the buy-out offer and naturally his opinion is that I'll be leaving Company X in a lurch if I agree to this. 

Ideally, I'd love to depart on good terms, without burning any bridges, as Company X were the ones who gave me my break in the industry. 

On the flip side, Company X has also expressed an interest in retaining me and they are willing to issue a counter-offer within a couple days time. I'm willing to hear them out on it. 
 
Went back to Company Y to inform them about how I feel a responsibility to fulfill my current projects with Company X. I did not make any mention of the counter-offer. 

Company Y's proposal is for me to take some time out of my schedule with Company X over the next few weeks and spend some time at their office to learn the ropes of the business. They will assign me with some tasks to do, and will pay me for the hours I put in. 

If I accept Company Y's request, I'll essentially be doing 2 jobs in a month. It's do-able, but it'll be extremely tiring and there's also a concern that I might not be able to meet their expectations.

Can you condense the text into a few key points?
<bot>: Caught in a game of chess between my current and prospective employers. Don't wanna piss off either side. Not quite sure what to do.