help me guys! Ill answer yours?

[Mckinzi]

am a student studying abroad in Europe. I don't know anyone here, so one of my good friends introduced me a guy she knows via Facebook who lives in Europe too. Him and I exchanged numbers, and even though I didnt think anything would come of it, we really started to like eachother and have been talking for over a month via Skype and text. Considering she knows him, I know he is a safe good guy, and after a month he invited me to come visit him (he lives a country away). I really liked this guy so I agreed, and he purchased me a ticket. I am supposed to leave next week.
I was happy as could be, but by chance my ex of 3 years randomly contacted me saying he misses me. Him and I hadnt even spoken in 6 months. I truly thought I was over him until I heard from him and all these old emotions started to come back. My ex said he wants to work towards getting back together while I'm studying away and make it official when I come back in 2 months.
I am single, so I could visit this guy and see where things go from there, but I feel guilty going to see him knowing that deep down I want to be with my ex.
The problem is the ticket is purchased by his name. I could pay him back, but not until I returned home.
Should I
1. Just go and see if we have a connection and decide what to do afterwards
2. Tell him I cant go and tell him I will repay him as soon as I get home
3. Other