I feel so isolated

Hi all, i recently separated from my partner and lost everything. I found she was cheating on me 10 days before we were due to get married. I know people say that it was better for me to find out now rather than once we're married, but I feel utterly devasted. I'm suffocating from the pain I'm in. I hoping to meet some new ppl close to the Portsmouth area and if it goes well maybe meet irl. Hope I hear from you