I need advice

So I've been talking to this guy for about a month. We went on many dates and he wants to keep seeing me and later on be in a relationship. He is very sweet and we get along well. But for the holidays he went back home for about 3 weeks. He texted me last night to tell me he got really drunk and slept with some random girl. He told me about it and said he still wants to see me. Should I keep seeing him or should I be worried since he slept with some random girl?